The Flatiron Building, originally the Fuller Building, is a triangular 22-story, 86.9 m high steel-framed landmarked building. Designed by Daniel Burnham and Frederick Dinkelberg, it was one of the tallest buildings in the city upon its 1902 completion, at 20 floors high, and one of only two 'skyscrapers'. As with numerous other wedge-shaped buildings, the name Flatiron derives from its resemblance to a cast-iron clothes iron.
The building, which has been called one of the world's most iconic skyscrapers and a quintessential symbol of New York City, anchors the south (downtown) end of Madison Square and the north (uptown) end of the Ladies' Mile Historic District.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.