The Golden Gate Bridge

The Seven Wonders of the Modern World

The Golden Gate Bridge links San Francisco with Marin County in absolute splendor. The bridge is one of the architectural marvels of the Twentieth Century and a testament to human strife, as it was constructed during the years of the Great Depression. For years, the Golden Gate Bridge held the title as the longest suspension bridge in the world.

Before its completion in 1937, the bridge was considered impossible to build, due to persistently foggy weather, 60-mile-per-hour winds, and strong ocean currents, which whipped through a deep canyon below. In fact, the bridge is commonly known as the "Bridge that couldn't be built." Despite these unforgiving natural elements, the bridge was constructed in a little more than four years. The total cost was $35 million. The total length of the bridge spans 1.2 miles. Eleven men lost their lives during the construction of the bridge.

Even today, the massive spans of the bridge are often shrouded in fog. The bridge sways 27 feet to withstand winds of up to 100 miles per hour. International Orange was the color chosen for the bridge because it blended well with the bridge's natural surroundings. The two great cables extending from the bridge contain 80,000 miles of steel wire, which is enough to circle the equator three times. The concrete poured to cement the bridge into the stormy waters below could have also been used to pave a five-foot sidewalk from New York to San Francisco.

Because of the Golden Gate Bridge, San Francisco is one of the premier skyline cities in the nation. It was a triumphant day in the history of the city when the bridge was completed on May 27, 1937. Over 200,000 people celebrated the grand opening of the Golden Gate Bridge by walking its length. The following day, a dedication ceremony was held to officially christen what would become the architectural trademark of the city. The regular flow of vehicular traffic began the next day.

Efforts to begin the construction on the bridge began as early as 1928. The process would entail the efforts of six counties in Northern California. In 1928, the counties formed a Golden Gate Bridge and Highway District. In 1930, the voters appropriated a $35 million bond issue to finance the building of the bridge. For many years following, Joseph Baerman Strauss, a distinguished engineer, dreamed of raising a span across the Golden Gate. It was in response to his vision that people first started saying that the bridge could not be built. But, amazingly enough, Strauss held fast to his vision, and a span was eventually raised across the Golden Gate Bridge. The actual work on the bridge began on January 5, 1933. It was completed four-and-one-half years later. The result astounded the fiercest of Strauss's critics. To this day, the bridge is admired for its magnitude and beauty.

The bridge is nothing short of a powerful force meant to combat nature. The often mighty winds from the Pacific Ocean are sustained by a mid span swing of 27 feet. The two towers of the bridge rise an impressive 746 feet, which is 191 feet taller than the Washington Monument. The pier of the bridge is only 1,215 feet from the shore, the distance between the two towers that support the cables, which in turn, support the floor of the bridge is 4,200 feet. These two cables are the largest bridge cables ever made at a little over 3.61 feet in diameter.

Today, pedestrians and bicyclists are still allowed to cross the bridge on pathways with breathtaking views of the city, Alcatraz, and the Marin Headlands. The bridge toll for vehicles is $5 when entering San Francisco.

The first exit of the Marin side of the bridge is Visa Point, which provides a magnificent view of the San Francisco skyline. But, the best way to view the bridge is to walk across. This usually takes about an hour.

The North Sea Protection Works

The Seven Wonders of the Modern World

For many, the image out of the Dutch fight against the North Sea rests in the figure of a young boy valiantly saving his town by using a finger to plug a hole in the dike. But this familiar hero is a fictional one, a creation of American author Mary Mapes Dodge in her book, Hans Brinker. In reality, heroism falls on all the Dutch, who for more than a millenium have been wresting precious agricultural lands from the sea and fighting to hold on to them. Their greatest achievement-a colossal fun in the dike-if the vast and one dress project known as that Netherlands North Sea protection works.

Because much of the Netherlands lies below sea level, normal tides would daily inundate about half the country if previous generations of industrious Dutch had not raised dikes and dams. Severe storms often cause tidal waters to crash into the dikes and inundate rivers and estuaries. Although all of the coastal areas are threatened, two particularly vulnerable ones are the large tidal inlet formerly known as the Zuider Zee and the delta created by the Rhine and Meuse rivers in the southwestern corner of the country.

Dutch engineers purse propose that the Zuider Zee be dammed and drained in the 19th century, but the government was reluctant to tackle such an immense project. Then, in 1916, a furious storm hit the northern provinces. The difficulties of wartime agricultural production were compounded, and the way was paved for the damming of the Zuider Zee.

The dam enclosing the Zuider Zee was built in two sections using traditional materials. Beginning in 1923, workers laid boulder clay in parallel layers and filled the space in between with sand, stones, and handmade, mattresses fashioned from brushwood. To curtail erosion, larger mattresses ballasted with chains and stones were sunk in the estuaries channels. Dredges, cranes, tugboats, and barges were engaged in the erection of the main dam, 300 feet wide at sea level and 25 feet high at the level of its causeway. As the tide turned on the final day of construction, fill tumbled into the dam's last gap, transforming the inlet into a freshwater lake, renamed the Ijsselmeer. The finished dam contains sluices for draining excess water and locks for maintaining shipping.

After the damming came the draining. In all, more than a half million acres of polders, or reclaimed farmland, emerged from the bottom of the former Zuider Zee. Young Dutch farmers clamoring for the right to settle the new polder lands, because farms on new, unobstructed land were far more suitable for modern, mechanized farming methods than traditional farms in older areas.

In 1953, the "storm of the century" howled across the North Sea and into the Netherlands, testing the strength of the Zuider Zee enclosure. It held, with damage to the causeway heavy in places. The country's unprotected southwestern provinces felt the full brunt of the storm, with water surging over seawalls and up the delta's wide waterways. More than 1,800 people lost their lives, and livestock numbering in the hundreds of thousands perished. The country then realized that the long-intended plan to safeguard the southwestern delta, the Delta Plan or Delta Project, must be mobilized.

The plan would undergo a many incarnations. The last one involved a damming four estuaries in the middle of the delta while leaving open channels to Rotterdam in the north and Antwerp, Belgium, in the south. A two-mile-long surge barrier in the Oosterschelde estuaries was the most complex and sophisticated piece of the project.

Originally, the Oosterschelde was to be a closed barrier. But lobbying by fishermen and conservationists resulted in the switch to a movable barrier. To facilitate construction, engineers fashioned islands on three sandbars in the estuaries and constructed work harbors, material yards, and work sites there. A dam connected two of the islands, effectively creating three channels in the estuaries, each to receive a section of the surge barrier.

The movable barrier consists of 65 concrete piers weighing 18,000 tons apiece. The piers support 300- to 500-ton steel gates and their hydraulic machinery, as well as a roadway above and load-bearing beams below. Constructed on the work islands, the piers and their mechanisms had to be lifted into precise positions in the estuary. But the type of equipment needed for such gargantuan and specialized tasks did not exist anywhere in the world; it had to be invented.

The Oosterschelde barrier also honored traditional methods. As part of the measures taken to stabilize the sea floor, mattresses were laid under each pier to prevent erosion. They were not the hand-built weaving of trees and brush used to close the Zuider Zee, however. Instead, they were high-tech sandwiches of sand and gravel between space-age fabric covers. The Oosterschelde project finished in 1986. Since then, the Dutch have taken additional measures, including the completion in 1997 of the barrier that protects the port of Rotterdam.

"In terms of magnitude," an American trade journal wrote, the North Sea project "approaches of the Great Wall of China. In terms of complexity and technical sophistication, it approaches the lunar shot. It is unique, expensive, and quite unlike any other civil engineering project to be found on this planet."

The Channel Tunnel

The Seven Wonders of the Modern World

Location:

Strait of Dover, between England and France

History:

Two centuries ago, the idea of a road tunnel was suggested to Napoleon during a brief peace between France and England in 1802. But war soon broke out again: the cartoon left is a joke, showing invading French troops walking under the sea in a road tunnel and flying over in balloons (the channel was first crossed by hot-air balloon in 1785).

Both schemes existed only on paper. They lacked the technology to overcome the problems, and did not have the necessary geological knowledge. They guessed that the chalk of Cap Blanc Nez ran under the sea all the way to the white cliffs of Dover - no-one really knew. They imagined horse-drawn carriages driving down a wood-propped tunnel like mines of the day, lit by candles.

The first steam locomotives hauled passenger trains in the 1820's. By 1850 , steam railways were running most of the way from Paris to Calais, and from London to Dover. Crossing the stormy channel in the small ferries of the day was the part of the journey that most travellers dreaded. Many problems arose and frenchman Thomé de Gamond worked hard to find convincing answers: in 1857 his scheme was widely accepted in England and France. After making many hazardous solo dives to check the sea-bed, he proposed a rail tunnel, bored through the chalk which he believed ran below the sea-bed.

Description:

The Channel Tunnel consists of three parallel tunnels running between the respective portals, or tunnel entrances, at either end. There are two rail tunnels, measuring 7.6 m (25 feet) in diameter and about 30 m (98 feet) apart, which carry trains north-west and south-east. Between the rail tunnels is a service tunnel, 4.8 m (16 feet) in diameter, which is connected by cross-passages to the main tunnels at intervals of approximately 375 m (1,230 feet). The service tunnel, served by narrow rubber-tyred vehicles, gives maintenance workers access to the rail tunnels and provides a route for escape during emergencies.

The two running tunnels are directly linked every 250 m (820 feet) by pressure relief ducts (PRDs) that pass over the top of the service tunnel and do not connect to it. At each portal there is a major facility allowing for trains to disassemble and turn around, including customs, maintenance, and other necessary services. The Channel Tunnel is 31 miles (50 km) long, of which 24 miles (39 km) are undersea. The average depth is 150 feet (45 m) underneath the seabed. It opened for business in late 1994, offering three principal services: a shuttle for vehicles, Eurostar passenger service linking London with Paris and Brussels, and through freight trains.

A journey through the tunnel lasts about 20 minutes; from start to end, a shuttle train journey totals about 35 minutes, including traveling a large loop to turn the train round. Eurostar trains travel considerably slower than their top speed while going through the tunnel (approximately 100 mph or 160 km/h, rather than their maximum of 186mph or 300km/h) fit in with the shuttle trains and avoid problems with heat generated in the tunnels by friction.

At completion, it was estimated that the whole project cost around £10 billion, including a cost overrun of 80 percent. The tunnel has been operating at a significant loss, and shares of the stock that funded the project lost 90% of their value between 1989 and 1998. The company announced a loss of £1.33 billion in 2003 and £570 million in 2004, and has been in constant negotiations with its creditors. In its defense, Eurotunnel cites a lack of use of the infrastructure, an inability to attract business because of high access charges, too much debt which causes a heavy interest payment burden, and a volume of both passenger and freight traffic 38% and 24%, respectively, of that which was forecast.

The Panama Canal

The Seven Wonders of the Modern World

History:

Among the great peaceful endeavors of mankind that have contributed significantly to progress in the world, the construction of the Canal stands as an awe-inspiring achievement. The unparalled engineering triumph was made possible by an international work force under the leadership of American visionaries, who made the centuries-old dream of uniting the two great oceans a reality.

In 1534, Charles I of Spain ordered the first survey of a proposed canal route through the Isthmus of Panama. More than three centuries passed before the first construction was started. The French labored 20 years, beginning in 1880, but disease and financial problems defeated them.

In 1903, Panama and the United States signed a treaty by which the United States undertook to construct an inter-oceanic ship canal across the Isthmus of Panama. The following year, the United States purchased from the French Canal Company its rights and properties for $40 million and began construction. The monumental project was completed in ten years at a cost of about $387 million. Since 1903 the United States has invested about $3 billion in the Canal enterprise, approximately two-thirds of which has been recovered.

The building of the Panama Canal involved three main problems -- engineering, sanitation, and organization. Its successful completion was due principally to the engineering and administrative skills of such men as John F. Stevens and Col. George W. Goethals, and to the solution of extensive health problems by Col. William C. Gorgas.

The engineering problems involved digging through the Continental Divide; constructing the largest earth dam ever built up to that time; designing and building the most massive canal locks ever envisioned; constructing the largest gates ever swung; and solving environmental problems of enormous proportions.

Now, more than 80 years after the first official ocean-to- ocean transit of the waterway, the United States and Panama have embarked on a partnership for the management, operation and defense of the Panama Canal. Under two new treaties signed in a ceremony at OAS headquarters in Washington, D.C., on September 7, 1977, the Canal will be operated until the turn of the century under arrangements designed to strengthen the bonds of friendship and cooperation between the two countries. The treaties were approved by Panama in a plebiscite on October 23, 1977, and the U.S. Senate gave its advice and consent to their ratificaton in March and April 1978. The new treaties went into effect October 1, 1979.

The Commission

The Panama Canal Commission, a U.S. government agency, will operate the Canal during the 20-year transition period that began with Panama Canal Treaty implementation on October 1, 1979. The Commission is supervised by a nine-member binational board. For the first 10 years, a U.S. citizen served as Chief Executive Officer, under the title of Administrator, and a Panamanian was the Deputy. Effective January 1, 1990, as mandated by the treaty, a Panamanian serves as Administrator and a U.S. citizen is the Deputy.

The Commission replaced the former Panama Canal Company, which, together with the Canal Zone and its government, was disestablished on October 1, 1979. On December 31, 1999, as required by treaty, the United States will transfer the Canal to Panama.

The Commission remains committed to serving world trade with the standards of excellence that have been the tradition of the waterway throughout its history. With prudent investment in maintenance, modernization and training programs, the Canal will remain a viable, economic transportation artery for world trade well into the future.

The CN Tower

The Seven Wonders of the Modern World

It is fitting that television, the technological wonder that profoundly changed life in the 20th century, spurred the building of the era's tallest freestanding structure. In the late 1960's, Toronto's soaring skyline began to play havoc with signals from conventional transmission towers. Signals bouncing off the city's skyscrapers produced a number of problems, including the annoying phenomenon of "ghosting" on television sets. Weaker signals competed with stronger ones, giving viewers the effects of watching two programs at once. To improve the situation, Canadian National Railways, or CN, proposed building a transmission tower that would stand head and shoulders - and then some - above Toronto's tallest buildings.

A Toronto firm prepared the initial design, enlisting the aid of engineering experts the world over. Their original plan showed three towers linked by structural bridges. Gradually the design evolved into a single 1,815.5-foot-tall tower comprised of three hollow "legs."

Foundation work began in 1973. Giant backhoes excavated more than 62,000 tons of earth and shale to a depth of 50 feet from a along the shore of Lake Ontario in Toronto harbour. Next, prestressed concrete and reinforced steel were arranged in a Y-shaped pattern 22 feet thick. Each hollow leg of the Y would carry its fair share of the tower's 130,000-ton burden.

The foundation took only four months to complete. The tower itself presented a challenge of height never before met by the technique of poured concrete. To meet that challenge, engineers designed a huge mold known as a slip form. Concrete was poured 24 hours a day, five days a week, and as it hardened, the mold moved upward by means of a ring of hydraulic jacks. The ascending slip form gradually decreased in girth to give the tower its tapering shape.

When the tower reached the 1,100-foot mark, the builders made preparations for the SkyPod, a seven-story structure housing two observation decks, a revolving restaurant, a nightclub, and broadcasting equipment. The SkyPod is anchored by 12 steel-and-wooden brackets that were slowly pushed up the tower by 45 hydraulic jacks. Concrete formed the SkyPod's "walls," and a doughnut-shaped ring, called a radome, was added to its base to protect the delicate microwave dishes receiving radio and television transmissions. The SkyPod is reached by four high-speed, glass-fronted elevators whose rapid rise simulates a jetliner's takeoff, unless weather conditions call for a much slower ascent.

The concrete tower continues above the SkyPod, ending at the Space Deck 1,465 feet up. The Space Deck receives support from cantilevers extending out of the concrete section beneath it. After a 58-second elevator ride from the SkyPod below, visitors can enjoy breathtaking vistas from a glass-enclosed balcony. On a clear day they might be able to glimpse sites 75 miles away.

For the last phase of construction, a Sikorsky Skycrane helicopter arrived to install the tower's 335-foot communications mast. One by one the helicopter lifted about 40 seven-ton sections of the mast to the top of the tower, where workers braved blustery March winds to receive them. When the sections were in place, they were secured by a total of 40,000 bolts. Afterward, the entire mast was covered by a fiberglass-reinforced sheathing to prevent icing.

Of interest to Torontonians since construction began, the CN tower gained additional fans with the arrival of the helicopter. Nicknamed Olga, its daily schedule was printed in newspapers, and changes were announced as breaking news on radio and television. With Olga, the mast assembly took a little longer than three weeks; without Olga, the job would have lasted six months.

Completed in 1975, the tower had cost $57 million to build, a bargain compared with other modern wonders. It also boasted incredible statistics of precision and safety. During construction, surveyors' transits up to a thousand feet away focused on optical plumbs mounted on the slip-form base. The constant surveillance kept the structure an incredible 1.1 inches within plumb.

Engineers established a wind-tolerance standard for the tower of 260 miles an hour, a level well above nature's most extreme demands. Counterweights on the antenna correct for wobble in high winds. Because the tower is an easy target for lightning, copper grounding wires were installed. As a result, visitors can safely view some 75 spectacular strikes a year.

The CN Tower is a work in progress. In recent years the tower gained two new elevators to accommodate an increase in visitors. To accomplish this, the 2,579-step metal staircase was moved to the interior of the structure. In addition, a glass floor was added to the SkyPod's observation deck. Brave visitors, the majority not surprisingly children, inch out over the visual void. More often than not the experience is pronounced, "Awesome!"

Almost twice as tall as the Eiffel Tower and more than three times the height of the Washington Monument, the CN Tower has taken proud ownership of Toronto's skyline, while exorcising the ghosts from its TV sets.

The Itaipu Dam

The Seven Wonders of the Modern World

The Itaipú hydroelectric power plant is the largest development of its kind in operation in the world. Built from 1975 to 1991, in a binational development on the Paraná River, Itaipú represents the efforts and accomplishments of two neighboring countries, Brazil and Paraguay. The power plant's 18 generating units add up to a total production capacity of 12,600 MW (megawatts) and a reliable output of 75 million MWh a year. Itaipú's energy production has broken several records over the recent years, after the last generating unit was commissioned in 1991. The generation of 77.212.396 MWh a year in 1995 will again be surpassed in 1996, and the new record will be around the 80 million MWh a year mark.

The magnitude of the project can also be demonstrated by the fact that in 1995 Itaipú alone responded for 25% of the energy supply in Brazil and 78% in Paraguay. The power plant is also a major tourism attraction in the Foz do Iguaçú area, having received around 9 million visitors from 162 countries. The Brazilian city of Foz do Iguaçu, also home of the famous Iguaçú Falls, is located at the Western tip of Paraná State, right by the border with Paraguay and Argentina.

General Outline of the Project

The Itaipú hydroelectric power plant, located 14 kilometers North of the International Bridge linking the cities of Foz do Iguaçú, Brazil, and Ciudad del Este, Paraguay, consists of a series of various types of dams a total distance of 7,744 meters with a crest elevation of 225 meters. The Powerhouse is located at the toe of the main Dam, most of it on the river bed and the rest on the Diversion Channel. The nominal power of the plant is 12,600 MW, divided between 18 generating units of 700 MW each, 15 of which are located in the main Powerhouse and the remaining three on the Diversion Channel. The Spillway is located on the right bank, and it has 14 segmented sluice-gates with a total discharge rate of 62,200 cubic meters per second (twice that of the highest flood- level on record). The Concrete Main Dam is of the hollow gravity type and is connected to the Spillway by a concrete buttress-type Wing Dam which continues thereon as a small Cardhfill dike. On the left bank a Rockfill Dam is linked to the Main Dam and at the other end to an Earthfill Dam. In order to build the main dam wall and the Powerhouse, the river was diverted through a Diversion Channel on the left bank.

The volumes of construction in Itaipú are also impressive. The volume of iron and steel utilized in the Dam structure would be enough to build 380 Eiffel Towers, and the volume of concrete used in Itaipú represents 15 times the volume utilized to build the Channel Tunnel between France and England. Itaipú is one of the Seven Wonders of the Modern World, according to a worldwide survey conducted by the American Society of civil Engineers (ASCE) and published in Dec. 1995 as a cover article of the North-American "Popular Mechanics". The article says that " To build [the Itaipú Dam], workers reenacted a labor of Hercules: they shifted the course of the seventh biggest river in the world (Paraná River, at the Brazil/Paraguay border) and removed more than 50 million tons of earth and rock." According to the magazine, "the true marvel of Itaipú, though, is its powerhouse ... a single building that puts out 12,600 megawatts -- enough to power most of California".

The Empire State Building

The Seven Wonders of the Modern World

HISTORY

Construction of the Empire State Building began in March of 1930 on the site of the old Waldorf-Astoria Hotel at 350 Fifth Avenue at 34th Street. It was completed 14 months later in May, 1931. Designed by the architectural firm of Shreve, Lamb, & Harmon Associates, the Empire State Building, at 102 stories, was the tallest building in the world until the completion of the first tower of the World Trade Center in Lower Manhattan in 1972.

LOCATION

350 Fifth Avenue, between 33rd and 34th Streets, New York, NY 10001

DESCRIPTION

Architects: Shreve, Lamb & Harmon Associates.

Builders: Starrett Brothers & Eken, Inc.

Height: 1,472 feet (448 meters) to top of antennae. 1,250 feet (391 meters) to 102nd floor observatory. 1,050 feet (320 meters) to 86th floor observatory.

Volume: 37 million cubic feet.

Area of Site: 83,860 square feet.

Cost including land: $40,948,900.

Cost of building alone: $24,718,000 (expected cost of $50 million

did not materialize due to the Great Depression)

Construction schedule:

Excavation: Begun January 22, 1930, before demolition of old Waldorf-Astoria Hotel completed.

Construction: Begun March 17, 1930. Framework rose at the rate of 4.5 stories per week.

Cornerstone: Laid by Alfred E. Smith, former governor of New York, September 17, 1930.

Masonry completed: November 13, 1930.

Official opening: May 1, 1931, by President Herbert Hoover, who pressed a button in Washington, D.C. to turn on the building's lights.

Total time: 7 million man hours, 1 year and 45 days work, including Sundays and holidays.

Work Force: 3,400 during peak periods.

Building Materials:

Exterior: Indiana limestone and granite, trimmed with aluminum and chrome-nickel steel from the 6th floor to the top.

Interior lobby: Ceiling high marble, imported from France, Italy, Belgium and Germany.

The Shwedagon Pagoda

The Seven Forgotten Wonders of the Medieval World

Location:- Rangoon, Burma.

In 1586, an English man, Ralph Fitch, visited the great pagoda and had the following to report:

....it is called Dogonne, and it is of a wonderful bignesse, and all gilded from the foot to the toppe...it is the fairest place, as I suppose, that is in all the world; it standeth very high, and there are foure ways to it, which all along are set with trees of fruits, such wise that a man may goe in the shade above two miles in length....

The origins of Shwedagon are lost in antiquity, its age unknown. Long before the pagoda was built, its location on Singuttara hill was already an ancient sacred site because of the buried relics of the three previous Buddhas. According to one legend, nearly 5000 years had passed since the last Buddha walked the Earth, and Singuttara hill would soon lose its blessedness unless it was reconsecrated with relics of a new Buddha. In order that such new relics might be obtained, King Okkalapa of Suvannabhumi spent much time atop the hill, meditating and praying. A series of miracles ensued and eight hairs of the historical Buddha were, somewhat magically, brought to the hill. To enshrine the relics, multiple pagodas of silver, tin, copper, lead, marble, iron and gold where built one on top of the other to a height of twenty meters. During the following centuries, passing from myth to historical fact, the pagoda grew to its present height of ninety-eight meters. Much of the continued construction of Shwedagon was actually reconstruction following disastrous earthquakes. During the 17th century the pagoda suffered earthquake damage on at least eight occasions. A particularly bad quake in 1786 brought the entire top half of the pagoda to the ground and its current shape and height date from the reconstruction of that time.

While much of the pagoda's beauty derives from the complex geometry of its shape and surrounding structures, equally mesmerizing is its golden glow. The lower stupa is plated with 8,688 solid gold bars, an upper part with another 13,153. The tip of the stupa, far too high for the human eye to discern in any detail, is set with 5448 diamonds, 2317 rubies, sapphires, and other gems, 1065 golden bells and, at the very top, a single 76-carat diamond. Surrounding the pagoda are a plentitude of smaller shrines housing pre-Buddhist spirits called Nats, miracle working images, and even a wish granting stone. The entire temple complex radiates a palpable sense of beauty and serenity.

The Parthenon

The Seven Forgotten Wonders of the Medieval World

The Parthenon is of Pentelic marble, of a purity of texture and color which astonishes all visitors. Along with a handful of monuments (the Taj Mahal, Saint Mark's in Venice), the Parthenon is familiar from countless photographs long before one actually sees it. Consequently, almost every visitor is oppressed by a secret fear: can the Parthenon possibly be as beautiful as one expects? Happily, the answer, despite the ravages of time, is yes. No photographs and no descriptions can prepare one for the unique golden glow of the Parthenon's columns.

The Parthenon has an exterior colonnade of eight Doric columns at each end, and seventeen Doric columns along each side. Each of these columns bulges slightly in the middle, a device which pre vents the massive columns from seeing lifeless and overly regular. In addition, this swelling (known in Creek as "entasis") corrected the optical illusion whereby perfectly straight columns appear to be slightly concave.

Within the temple itself were two chambers, one in which the statue of Athena Parthenos stood, and one which housed the temple treasury. Visitors to the Parthenon today, disappointed not to be allowed inside, should take some comfort from the fact that most Athenians in antiquity never were permitted inside the temple. Only priests ever entered the treasury, and the statue itself was viewed only rarely. One of those who saw the statue was Pausanias, who describe the Athena as standing "upright in an ankle length tunic with a head of Medusa carved in ivory on her breast. She has a Victory about eight feet high, and a spear in her hand and a shield at her feet, and a snake beside the shield; this snake might be Erichthonios."

The temple itself was adorned with sculpture, of a quality never before, and never since, equaled. The metopes (rectangular panels above the columns) were sculptured with scenes from the Trojan War, and from the Battles of the Athenians and Amazons, the Lapiths and Centaurs, and t he Gods and Giants. In addition, a sculptured frieze above the temple walls depicted the great Panathenaic procession. In this annual celebration, Athenian youths and maidens accompanied the new robe for Athena's statue from Eleusis to the Akropolis itself. The young men on horseback, the maidens, the sacrificial oxeri, and the gods themselves all were depicted, and may be seen today - but not in Athens.

The sculptures, known as the Elgin Marbles, are on view in . London at the British Museum. A few carvings remain in place on the Parthenon, and some fragments are on view in the Akropolis Museum.

In addition, the Parthenon had monumental sculpture in both pediments. As Pausanias concisely put it, "As you go into the temple called the Parthenon, everything on the pediment has to do with the birth of STRONG>Athena; the far side shows Poseidon quarrelling with Athena over the country." As we know, Athena won this contest by producing the first olive tree, and the Athenians did not stint in honoring her with Greece's finest temple. However, the Athenians were always practical: the gold regalia which clad the great statue was designed so that it could be removed for safekeeping. The Athenians had learned what could happen to their sacred sites in the Persian sack of the Akropolis of 480 B.C

The Moai Statues

The Seven Forgotten Wonders of the Medieval World

Easter Island has long been the subject of curiosity and speculation. How and why did its inhabitants carve and transport the massive statues which surround the island? What remains of this culture today, and what lessons can we learn from their legacy? This page is a resource for information on the Internet about Easter Island, also known as "Rapa Nui" and "Isla de Pascua".

Easter Island is over 2,000 miles from the nearest population center, (Tahiti and Chile), making it one of the most isolated places on Earth. A triangle of volcanic rock in the South Pacific - it is best known for the giant stone monoliths, known as Moai, that dot the coastline. The early settlers called the island "Te Pito O Te Henua" (Navel of The World). Admiral Roggeveen, who came upon the island on Easter Day in 1722, named it Easter Island. Today, the land, people and language are all referred to locally as Rapa Nui.

There has been much controversy and confusion concerning the origins of the Easter Islanders. Thor Heyerdahl proposed that the people who built the statues were of Peruvian descent, due to a similarity between Rapa Nui and Incan stonework. Some have suggested that Easter Island is the remnant of a lost continent, or the result of an extra-terrestrial influence . Archaeological evidence, however, indicates discovery of the island by Polynesians at about 400 AD - led, according to legend, by Hotu Matua. Upon their arrival, an impressive and enigmatic culture began to develop. In addition to the statues, the islanders possessed the Rongorongo script; the only written language in Oceania. The island is also home to many petroglyphs (rock carvings), as well as traditional wood carvings, tapa (barkcloth) crafts, tattooing, string figures, dance and music.

The population of Easter Island reached its peak at perhaps more than 10,000, far exceeding the capabilities of the small island's ecosystem. Resources became scarce, and the once lush palm forests were destroyed - cleared for agriculture and moving the massive stone Moai. In this regard, Easter Island has become, for many, a metaphor for ecological disaster.

Thereafter, a thriving and advanced social order began to decline into bloody civil war and, evidently, cannibalism. Eventually, all of the Moai standing along the coast were torn down by the islanders themselves. All of the statues now erected around the island are the result of recent archaeological efforts.

Contacts with western "civilization" proved even more disastrous for the island population which, through slavery and disease, had decreased to approximately 111 by the turn of the century. Following the annexation by Chile in 1888, however, it has risen to more than 2,000, with other Rapanui living in Chile, Tahiti and North America. Despite a growing Chilean presence, the island's Polynesian identity is still quite strong .

Easter Island today, remains one of the most unique places you will ever encounter; an open air museum showcasing a fascinating, but unfortunately lost, culture. The Rapanui are among the friendliest people you will ever meet, and the landscape is truly amazing - with its volcanic craters, lava formations, beaches, brilliant blue water, and archaeological sites .

GETTING THERE

Lan Chile flies to Easter Island, with flights operating between Santiago,Chile and Papeete,Tahiti. Airfare from Santiago,Chile to Easter Island and back costs approximately $800 US. There are several companies who can arrange package trips, including hotels, tours etc., but it is possible, and much cheaper, to arrange a place to stay upon arrival. Many locals who operate hotels and guesthouses arrive at Mataveri Airport to greet the tourists, and is something you might consider. Staying in a private home is a great way to meet the islanders and experience the local culture; however, one should use judgment in choosing accommodations, as not all places are of equal quality.

Notably, the tourism on Easter Island is run entirely by the Rapanui themselves. In late January to early February the islanders celebrate Tapati, a festival honoring the Polynesian cultural heritage of the island. ( January 30 - February 14, 1998 ). Far Horizons Archaeological and Cultural Tours organizes tours to the festival.

Mont Saint-Michel

The Seven Forgotten Wonders of the Medieval World

Location:

Normandy, France.

History:

Legend has it that, in 708, the Bishop of Avranche was visited three times in his sleep by the archangel Saint Michael, who implored him to build a sanctuary in his honor on the Mont Tombe, a small, rocky islet near the coast of Normandy. The Bishop obeyed by having a crypt excavated and a chapel erected on the mountain’s summit, thus transforming the Mont Tombe (a mysterious spot once used as a cemetary or a druidic place of worship) into the Mont Saint Michel, light of Christendom.

Many pilgrims came here during the following years, attracted by the Mont’s rapidly spreading reputation, and some of them even gave generously to contribute to its growth. But it is Richard I, Duke of Normandy, who really gave the Mont Saint Michel its credentials when he sent to the sanctuary around thirty benedictine monks to attend to the task of making it into a temple of prayer worthy of the name

From this moment on, the Mont Saint Michel became one of the most imposing monuments dedicated to the glory of God. In 1017, Richard II undertook to rebuild the chapel, by then deemed too modest. From 1212 to 1228, following a fire that had destroyed almost all of the site, Philippe Auguste helped rebuild the church and add two adjacent buildings to accommodate the monks. Finally, during the XVth century, a new choir was added to the Romanesque nave of the church; all of which conferred on the Mont Saint Michel the stature of an immense temple defying time and the elements — a powerful symbol of the presence of the divine within man.

The Taj Mahal

The Seven Forgotten Wonders of the Medieval World

Located at the city of Agra in the State of Uttar Pradesh, the Taj Mahal is one of the most beautiful masterpieces of architecture in the world. Agra, situated about 200 km south of New Delhi, was the Capital of the Mughals (Moguls), the Muslim Emperors who ruled Northern India between the sixteenth and nineteenth centuries. The Mughals were the descendents of two of the most skilled warriors in history: the Turks and the Mongols. The Mughal dynasty reached its highest strength and fame during the reign of their early Emperors, Akbar, Jehangir, and Shah Jehan.

It was Shah Jehan who ordered the building of the Taj, in honor of his wife, Arjumand Banu who later became known as Mumtaz Mahal, the Distinguished of the Palace. Mumtaz and Shah Jehan were married in 1612 and, over the next 18 years, had 14 children together. The Empress used to accompany her husband in his military campaigns, and it was in 1630, in Burhanpur, that she gave birth to her last child, for she died in childbirth. So great was the Emperor love to his wife that he ordered the building of the most beautiful mausoleum on Earth for her.

Although it is not known for sure who planned the Taj, the name of an Indian architect of Persian descent, Ustad Ahmad Lahori, has been cited in many sources. As soon as construction began in 1630, masons, craftsmen, sculptors, and calligraphers were summoned from Persia, the Ottoman Empire, and Europe to work on the masterpiece. The site was chosen near the Capital, Agra on the southwest bank of the River Yamuna. The architectural complex is comprised of five main elements: the Darwaza or main gateway, the Bageecha or garden, the Masjid or mosque, the Naqqar Khana or rest house, and the Rauza or the Taj Mahal mausoleum. The actual Tomb is situated inside the Taj.

The unique mughal style combines elements of Persian, Central Asian, and Islamic architecture. Most impressive are the black and white chessboard marble floor, the four tall minarets (40 m high) at the corners of the structure, and the majestic dome in the middle. On closer look, the lettering of the Quran verses around the archways appears to be uniform, regardless of their height. The lettering spacing and density has been customized to give this impression to the beholder. Other illusionary effects have been accounted for in the geometry of the tomb and the tall minarets. The impressive pietra dura artwork includes geometric elements, plants and flowers, mostly common in Islamic architecture. The level of sophistication in artwork becomes obvious when one realizes that a 3 cm decorative element contains more than 50 inlaid gemstones.

Angkor Wat

The Seven Forgotten Wonders of the Medieval World

Angkor Wat, one of the most beautiful and mysterious historical sites in the world. Located over 192 miles to the North-West of Cambodia's capital Phnom Penh, Angkor has been "protected" from tourism, and the customs and the cultures of the people living there have not changed much. However, intense internal warfare for over fifty years has impacted on the people and to an extent on the physical structure of the temples at Angkor.

In 1991, the Khmer Rouge, the guerrilla movement, controlled the area. It was then very difficult to visit the area, and the only way to get there was by Helicopter from Phnom Penh. I will never forget when I first got out from the Helicopter, and stepped into the land of history, a land which the western civilization had forgotten. In this paper, I would like to discuss the history of the great temples of the "lost city" of Angkor Wat, but I would also like to describe some of my own observations from the summer of 1991.

For many years, Angkor Wat was totally isolated from the Western World. Large, thick jungles covers the area, and it is located in the center of Cambodia. The French colonialists were the first westerners to get exposed to Angkor. They heard rumors from the local population about "temples built by gods or by giants." Most of the colonialists referred these rumors to folk tales, but some believed that there really was a "lost city of a Cambodian empire", which had once been powerful and wealthy.

The temples were first discovered by French missionaries in 1860. Henri Mahout, a French botanist started intensive research and restoration programs. These research efforts continued until 1968, when the Vietnam war disrupted the studies. Initially, he did not believe that the temples were built by Cambodians, but by another race which had concurred and occupied Cambodia for over 2000 years ago. His theory would later be proven to be incorrect, after that researchers discovered scripts on the walls of the temples, and stone sculptures, that have made it possible for archeologists to piece together the history of Cambodia. Now it is known that Angkor, was the great capital city of the Khmer empire from the city's founding in about AD 880 until about 1225.

The history of Angkor Wat dates back to the kingdom of Funan. This kingdom was established by an Indian Brahmin, and in AD200, the country was peacefully settled by Indian traders. Four hundred years later, the kingdom had become a prosperous trading region. As the area was located on the Pilgrim rout between China and India, Hinduism and Chinese Buddhism was adopted by the new settlers. The Indian and Chinese influence can still be felt in Cambodia, and the temples of Angkor Wat closely resembles Hindu and Buddhist temples that can be found in Northern India and in Nepal. In the end of AD600, the Funan Empire lost much of its power to the kingdom of Chenla. The capital of this new empire, Sambor, was located about 40 miles to the Southeast of Angkor. During this time, beautiful sculptures and carvings in sand-stone was popular. In AD750, a king with a reputation of being a war-like person, who was able to expand the Chenla kingdom. However, trade with India stopped, and the Indonesian Empire raised to power.

In AD800, the kingdom of Kambuja was established, and king Jayavarman I took control over the kingdom. He built several capitals near Angkor Wat, were responsible for many social changes, and was able to size land to the North and to the East. In AD889, a nephew of Jayavaram became the new emperor, and he was able to bring peace and unity to the Khmer Kingdom. In AD944, Jayavarman V established many Mahayana Buddhist temples near Angkor, and moved the court to Yasodharapura, at Angkor. Cultures prospered, and so did the Khmer empire. In AD1000, Suryavarman, a young man who may have come from the Malayan provinces of the empire, ascends the throne of Kambuja. He would become the king of Kambuja for over 50 years. He is responsible for the planning and foundations of the city of Angkor. In AD1051, Udayadityavarman II succeed Suryavarman, and continued to build the city of Angkor, and restored many of the temples. Angkor was now both a sacred temple city and the center of a vast irrigation system.

Massive expansion of the city continued throughout the next 200 years, and ambitious building programs expanded the city. Many temples were built. The temples are spread out over about 40 miles around the village of Siem Reap. Temples and similar structures to the temples that can be found in the city of Angkor are common sights in Thailand, Laos, Vietnam and in China. Perhaps the most famous temple, Angkor Wat, is a temple dedicated to the Hindu god Vishnu was built during this period.

Angkor Wat is the highest achievement of Khmer temple architecture, and is today the "flagship" of the temples at Angkor. The temple is a huge pyramid structure. The compound at Angkor Wat covers an area of 1,500 by 1,300 m (4,920 by 4,265 ft) and is surrounded by a vast moat 180 m (590 ft) wide. Along the causeway leading to the enormous entrance gate are balustrades shaped as giant serpents, which are believed to represent emblems of cosmic fertility. The temple consists of a towering complex of terraces and small buildings that are arranged in a series of three diminishing stories and surmounted by five towers. The roofed and unroofed structures are covered with bands of finely carved stone sculptures. The walls are covered with carved reliefs that illustrate Hindu mythology, principally scenes relating to the god Vishnu, to whom the temple was dedicated. The "mass of bas-relief carving is of the highest quality and the most beautifully executed in Angkor." All the temple mountains of Angkor were filled with three-dimensional images and every inch of the walls are covered by sculptures.

In the beginning of AD1200, the Angkor and the Khmer empire started to decline. When jayavarman VII died, the Thai Empire in the West emerged as a major power in the region. The Thai capital was moved to Ayudhya, near Angkor, and obviously threatened the Cambodian kingdom. In AD1389 the Thais attacked Angkor, and the city fell into the hands of the Thais. The 15th-century conquest of the Khmer kingdom by the Thais resulted (1431) in the final abandonment of Angkor. The city was deserted and the capital was moved to Eastward to the region of the present capital Phnom Penh.

Miraculously, very little damage has been made on the Angkor region as a result of the bloody civil that has terrorized the Cambodia for over 30 years. The Khmer Rouge, an extreme-left organization has actively organized guerrilla activities against Prince Sihanouk's government. In 1975, many Buddhist monks who lived in the Angkor temples were massacred along with the majority of the Buddhist population as a result of a "social reorganization". However, Angkor Wat suffered very little structural damage in that attack. Today, archeologists from all over the world are actively involved in the restoration process of the temples. Much of the history of the "Lost city" of Angkor is still a mystery, but Angkor has entered the "Coca Cola" and "Kodak" age, and as Cambodia is becoming more developed, the mystical atmosphere at Angkor will disappear

The Great Temple of Abu Simbel

The Seven Forgotten Wonders of the Medieval World

This is the great temple of Abu Simbel, dedicated to the glory of pharao Ramses II. Though the temple is officially dedicated to the triad Amon-Ra, Ptah and Ra-Harakhte, its front is dominated by four gigantic statues of the great pharaoh himself. He had this temple built in this otherwise desolate area on the actual site of a much older shrine of a local personification of the god Horus.

The colossi of the king, wearing the characteristic nemes headcloth and double crown (of upper and lower Egypt), are each 20 metres high, while the facade is more than 35 metres wide and 30 metres high. The king is accompanied by some of his wives, sons and daughters who appear in much smaller size beside his legs. Right above the entrance stands a figure of the god Re-Harakhte in a small niche. The top of the facade is crowned by a row of baboons.

The central entrance leads into a large hall with massive pillars fronted by Osiris figures of the king. The temple's orientation is arranged in such a way that twice every year on 22 February and 22 October the earliest sun-rays shine on the back wall of the innermost chamber, thus illuminating the statues of the four gods seated there.

The Leaning Tower of Pisa

The Seven Wonders of the medieval world

The Tower of Pisa is the bell tower of the Cathedral. Its construction began in the august of 1173 and continued (with two long interruptions) for about two hundred years, in full fidelity to the original project, whose architect is still uncertain.

In the past it was widely believed that the inclination of the Tower was part of the project ever since its beginning, but now we know that it is not so. The Tower was designed to be "vertical" (and even if it did not lean it would still be one of the most remarkable bell towers in Europe), and started to incline during its construction.

Both because of its inclination, and its beauty, from 1173 up to the present the Tower has been the object of very special attention. During its construction efforts were made to halt the incipient inclination through the use of special construction devices; later colums and other damaged parts were substituted in more than one occasion; today, interventions are being carried out within the sub-soil in order to significantly reduce the inclination and to make sure that Tower will have a long life.

In all this story it is possible to find a meaningful constant, the "genetic code" of the Tower: its continual interaction with the soil on which it was built. Today's (1999) works for the safeguard and the conservation of the Tower with very advanced methodologies are designed to fully respect this constant.

Hagia Sophia seven wonder of Medieval

The Seven Wonders of the medieval world

For centuries it stood at the heart of two of the world's great religions: To Christians it was Hagia Sophia, Church of the Holy Wisdom, mother church of the Orthodox faith and of the thousand-year-old Byzantine Empire. To Muslims, it became Ayasofya Camii, Mosque of Holy Wisdom and jewel of Istanbul. But to people of all faiths, it was, in the words of sixth-century historian Procopius, a "spectacle of marvellous beauty, overwhelming to those who know it by hearsay altogether incredible. For it soars to a height to match the sky...stands on high and looks down on the remainder of the city...."

In A.D. 326, Constantinople was laid out on the shores of the Bosporus by Emperor Constantine. Thirty years later, his successor built its first great church - eventually called Hagia Sophia - but it stood only 172 years before rioting crowds burned it to the ground. This event, in 532, was perhaps auspicious: It occurred during the reign of Justinian the Builder, who would give the world the sublime "tent of the heavens" that still stands and in whose creation "God has surely taken part."

Reconstruction started just 39 days after the destruction of the original church. The gigantic structure was modeled loosely on the Roman Pantheon. Measuring 220 feet by 250 feet along its main floor, it was laid out as a rectangle, at whose center was a square. Soaring 180 feet above the square was a dome supported by four massive pendentives on equally massive piers. At the east and west ends of the dome square were two have domes serving as the apse and entrance bay. The engineering feat was even more incredible considering that only brick, mortar, and stone were used. Although the earlier Romans knew how to make concrete, these Eastern builders did not.

Justinian embellished the interior with riches. Four acres of gold mosaics shimmered from the ceiling, and multicolored marble gleamed from the floors, columns, and wall panels.

Less than six years after work on it began, Justinian's monument to Christendom was completed. In A.D. 558 much of it collapsed due to the many earthquakes in the region. Because the initial architects, Anthemius and Isodorus, were no longer living, the latter's nephew, Isidorus the Younger, was given the task of rebuilding. This time it lasted 400 more years before collapsing again, and being again rebuilt.

In 1204, knoghts of the Fourth Crusade marched on the Byzantine Empire's capital city, stripping it and Hagia Sophia so remorselessly that a chronicler called it the most awesome plunder "since the creation of the world."

When Rome's hegemony ended 57 years later, the Church of the Holy Wisdom was devoid of glittering wealth. Bulky buttresses were built to shore it up, but its days of glory, and those of Constantinople, were drawing to a close. In 1453, Sultan Mohammed II massed the Ottoman army in front of the city. After a 53-day siege, the Byzantine Empire's great capital capitulated, and the conqueror marched into town and directly to Hagia Sophia. His ulama recited a Muslim prayer, and the sultan declared Eastern Christianity's cornerstone a mosque.

For almost 500 years it remained such, its mosaics whitewashed to hide the "idolatrous" figures of humans. Koranic inscriptions were placed in the four corners beneath the dome; four minarets were erected at the corners of the exterior perimeter; a gilded bronze crescent replaced the large metal cross crowning the basilica.

While the changes offended Christians, the Mosque of Holy Wisdom enjoyed a place of high regard among devotees of Islam. In the 20th century, Turkish leader Kemal Ataturk viewed the structure as a unifying symbol for East and West. He closed the mosque in 1932, uncovered its medeival mosaics, and reopened Hagia Sophia as a museum in 1934. Nearly 15 centuries after Justinian, it stands as a monument to both human and divine wisdom.

The Porcelain Tower of Nanjing

The Seven Wonders of the medieval world

Location:
Nanjing, China, out on the banks of the Yangtze.

History:
The people of China called it Bao'ensi, the "Temple of Gratitude." European visitors who beheld the structure called it the Porcelain Tower of Nanjing and labeled it one of the wonders of the world. But warfare and subsequent destruction overtook it in the 19th century, and this remarkable structure was almost lost to history, virtually forgotten by the world.

Still, for many people who had known the tower firsthand, it was a sublimely elegant example of a Buddhist pagoda. "The best contrived and noblest structure of all the East," wrote Le Comte, the French mathematician who had made a visit to China in the early 19th century.

Description
From an octagonal base about 97 feet in diameter, the tower's nine stories rose pyramidally to a height of about 260 feet. According to information obtained by an American missionary who journeyed to Nanjing in 1852, the original plan for the tower had called for 13 stories and a total height of about 330 feet. Although those ambitious dimensions were never realized, the smaller size made little difference, because size was not what made the structure so memorable for visitors.

The brilliant white porcelain bricks that faced the tower were what made it so unforgettable. By day, the bricks glittered in the sun, and at night they were illuminated by perhaps as many as 140 lamps hanging around the exterior of the pagoda. Worked into the porcelain panels were colorful stoneware tiles with green, yellow, white, and brown glazes forming images of animals, landscapes, flowers, and bamboo.