Washington Monument

The Washington Monument is a monolith on the National Mall in Washington, D.C., worked to honor George Washington, once president of the Continental Army and the main American president. Standing verging on due east of the Reflecting Pool and the Lincoln Memorial, the landmark, made of marble, rock, and bluestone gneiss,[3] is both the world's tallest stone structure and the world's tallest monolith, standing 554 feet 7 11⁄32 inches (169.046 m) tall.[n 1] It is the tallest great segment on the planet if all are measured over their person on foot passages, yet two are taller when measured over the ground, however they are neither all stone nor genuine obelisks.[n 2] 

Development of the landmark started in 1848, and was ended from 1854 to 1877 because of an absence of assets, a battle for control over the Washington National Monument Society, and the mediation of the American Civil War. In spite of the fact that the stone structure was finished in 1884, interior ironwork, the meadow, and other completing touches were not finished until 1888. A distinction in shading of the marble, obvious around 150 feet (46 m) or 27% up, shows where development was ended and later continued with marble from an alternate source. The first plan was by Robert Mills, a designer amid first 50% of the nineteenth century, however he suspended his corridor, continuing just with his pillar, whose level top was modified to a pointed marble pyramidion in 1884. The foundation was laid on July 4, 1848; the primary stone at the 152-foot (46.3 m) level was laid August 7, 1880, the capstone was determined to December 6, 1884, and the finished landmark was committed on February 21, 1885. It authoritatively opened October 9, 1888. Upon fruition, it turned into the world's tallest structure, a title already held by the Cologne Cathedral. The landmark held this assignment until 1889, when the Eiffel Tower was finished in Paris, France.

The landmark was harmed amid the 2011 Virginia seismic tremor and Hurricane Irene around the same time and stayed shut to people in general while the structure was surveyed and repaired. After 32 months of repairs, the National Park Service and the Trust for the National Mall revived the Washington Monument to guests on May 12, 2014