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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 in height standing 555 feet 5⅛ inches (169.294 m). It is also the tallest structure in Washington D.C. The actual construction of the monument began in 1848 but was not completed until 1884. This hiatus in construction happened because of co-option by the Know Nothing party, a lack of funds, and the intervention of the American Civil War. A difference in shading of the marble, visible approximately 150 feet (46 m), or 27%) up, shows where construction was halted for a number of years. Upon completion, it became the world's tallest structure, a title previously held by the Cologne Cathedral. The monument held this designation until 1889, when the Eiffel Tower was completed in Paris, France.