Is the Washington, D.C. monument 555 feet high and made of marble?

The Washington Monument, a stately obelisk of marble (555 ft. high ), east from the speedway, Washington, U.S.A. | Library of Congress.



The Washington Monument is approximately 555 feet tall (specifically 554 feet, 7 and 11/32 inches) and is primarily constructed of granite and bluestone gneiss, but it is famously faced with marble. The exterior utilizes three distinct types of white marble from different quarries: Texas (Maryland), Sheffield (Massachusetts), and Cockeysville (Maryland). Because construction was halted for 23 years (1854–1877) due to the Civil War and funding issues, the marble used for the upper two-thirds of the obelisk came from a different source than the bottom third, resulting in a visible "color line" about 150 feet up. As of 2026, it remains the world’s tallest stone structure and the world’s tallest obelisk. The walls are 15 feet thick at the base and taper to just 18 inches at the top, supporting a solid marble capstone topped with a small aluminum pyramid. This engineering marvel stands as a testament to 19th-century masonry, enduring earthquakes and weather while serving as the most recognizable landmark on the National Mall.

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5 Things You Might Not Know About the Washington Monument
  • Plans for the monument began even before Washington was elected president. ...
  • The original design for the monument was much different than what ended up being built. ...
  • The monument was once the site of a hostage situation. ...
  • The monument has survived an earthquake.


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On a breezy December 6, 1884, the 36-year construction of the Washington Monument was completed with the placing of an 8.9 inch tall, 100-ounce pyramid of solid aluminum atop the capstone.

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However, after Washington became president, he scrapped the plans for his memorial, as federal government funds were tight and he didn't want to use public money for the project.

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How Tall Is the Eiffel Tower? The Eiffel Tower is 984 feet (300 m) tall. It is taller than the Washington Monument (at 555 ft / 170 m) but shorter than the Empire State Building in NYC (1,250 ft / 381 m)!

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“Whatever changes have occurred here would be much, much more subtle.” The monument sits about 15 to 20 feet above sea level and has sunk about 2 inches into the ground since it was completed in 1884.

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Thereafter in the actual implementation of the Monument's construction the engineers responsible for it's construction apparently observed that the formal nexus originally intended was too marshy and the soil there presumably not competent to support the weight of the massive structure proposed.

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The pyramid was supposed to serve as a lightning rod, and since Frishmuth had already done some plating work for the monument, the U.S. Army Corps of Engineers called on him to fashion the topper as well. They requested a small metal pyramid, preferably made from copper, bronze, or platinum-plated brass.

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“We were able to determine about 3/8 of an inch had been melted off from the very top.” That means the original 1884 measurement, completed with much less sophisticated equipment, was within ¾ of an inch of the findings from the newest survey, using the original brass markers as a base point.

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As the nation's tallest monument, the Gateway Arch has welcomed visitors for more than fifty years with its iconic, awe-inspiring shape. The vision of renowned architect Eero Saarinen, the Gateway Arch commemorates Thomas Jefferson's vision and St. Louis' role in the westward expansion of the United States.

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The Washington Monument is taller than the Statue of Liberty. The Washington Monument is 554 feet 7 inches while the Statue of Liberty has a height of 305 feet.

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