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The past and future of the Roman Colosseum

The past and future of the Roman Colosseum
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The past and future of the Roman Colosseum

The Colosseum measures 620 feet by 513 feet with seating for more than 50,000 spectators and was the largest amphitheater in the Roman world. The Colosseum was active for four cent ...

The Colosseum measures 620 feet by 513 feet with seating for more than 50,000 spectators and was the largest amphitheater in the Roman world. The Colosseum was active for four centuries until the 6th century A.D. It stopped all operations after a struggling Western Roman Empire, ...

Symbolism and Design of the St. Louis Arch

Symbolism and Design of the St. Louis Arch
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Symbolism and Design of the St. Louis Arch

In 1947, the St. Louis Arch was designed by the architect Eero Saarinen and built as a weighted catenary arch. Standing at 630 feet, the St. Louis Gateway Arch is the tallest arch ...

In 1947, the St. Louis Arch was designed by the architect Eero Saarinen and built as a weighted catenary arch. Standing at 630 feet, the St. Louis Gateway Arch is the tallest arch in the world, the tallest man-made monument in the Western Hemisphere, and the tallest accessible bu ...

History of the Seven Mile Bridge

History of the Seven Mile Bridge
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History of the Seven Mile Bridge

The Seven Mile Bridge is the longest bridge among others that connect the Keys, and is part of U.S. Route 1 and the Overseas Highway. This bridge connects Knight's Key (part of the ...

The Seven Mile Bridge is the longest bridge among others that connect the Keys, and is part of U.S. Route 1 and the Overseas Highway. This bridge connects Knight's Key (part of the city of Marathon, Florida) located in the Middle Keys to Little Duck Key in the Lower Keys. The his ...

The Pont du Gard Aqueduct in France

The Pont du Gard Aqueduct in France
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The Pont du Gard Aqueduct in France

Crossing the Gardon River in southern France, the Pont Du Gard is one of the best-preserved ancient aqueduct bridges built in the first century AD by the Romans. In 1985 it was add ...

Crossing the Gardon River in southern France, the Pont Du Gard is one of the best-preserved ancient aqueduct bridges built in the first century AD by the Romans. In 1985 it was added to the list of World Heritage Sites by UNESCO (United Nations Educational, Scientific, and Cultur ...

Aztec Engineering Techniques and Technologies

Aztec Engineering Techniques and Technologies
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Aztec Engineering Techniques and Technologies

Originally a nomadic tribe until they settled in Mexico, the Aztecs built their empire in the city of Tenochtitlan in the 14th century. They were excellent farmers and builders and ...

Originally a nomadic tribe until they settled in Mexico, the Aztecs built their empire in the city of Tenochtitlan in the 14th century. They were excellent farmers and builders and prided themselves on their work, avoiding the use of animals and doing it themselves. Although they ...

Breaking of the Enigma Machine

Breaking of the Enigma Machine
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Breaking of the Enigma Machine

Above Photo of Enigma Machine by Alessandro Nassiri The Enigma machine was developed in the early 20th century at the end of World War I, and used in all branches of the German ...

Above Photo of Enigma Machine by Alessandro Nassiri The Enigma machine was developed in the early 20th century at the end of World War I, and used in all branches of the German military during World War II. The Enigma machine was an encryption device which scrambled the letter ...

Triangle Shirtwaist Factory Fire: March 25, 1911

Triangle Shirtwaist Factory Fire: March 25, 1911
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Triangle Shirtwaist Factory Fire: March 25, 1911

On March 25, 1911, the Triangle Shirtwaist Factory in Greenwich Village of New York City caught fire. It would become known as the worst industrial fire in the area’s history and o ...

On March 25, 1911, the Triangle Shirtwaist Factory in Greenwich Village of New York City caught fire. It would become known as the worst industrial fire in the area’s history and one of the deadliest in the nation. The fire caused the tragic deaths of 123 women and 23 men. Most w ...