The Washington Monument: Facts, History & Profile | Infoplease
https://www.infoplease.com/geography/monuments-landmarks/the-washington-monument
WebJun 1, 2023 · Base width: 55 feet (16.76 m) Top width: 34 feet (10.36 m) Weight: 90,854 tons (82,421 metric tons) Materials: Marble, granite, and sandstone. Number of blocks used: 36,491. Washington Monument Trivia. The Washington Monument was closed for four years after an earthquake left it damaged in August 2011.
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