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The Home Insurance Building was built in 1885 in Chicago, Illinois, USA and destroyed in 1931 to make way for the Field Building (now the LaSalle National Bank Building). It was the first building to use structural steel in its frame, but the majority of its structure was composed of cast and wrought iron. It is generally noted as the first tall building to be supported, both inside and outside, by a fireproof metal frame.
The Washington Monument is an obelisk near the west end of the National Mall in Washington, D.C., built to commemorate the first U.S. president, General George Washington. The monument, made of marble, granite, and sandstone, is both the world's tallest stone structure and the world's tallest obelisk, standing 555 feet 5⅛ inches (169.294 m). There are taller monumental columns, but they are neither all stone nor true obelisks. It is also the tallest structure in Washington D.C..