The Washington Monument was built to commemorate George Washington. It is the world's tallest stone structure and tallest obelisk. It is about 555 feet tall. I believe construction began before the Civil War, in 1848. You can see the change in stone that was used due to a hault in building due to the lack of funds from the war. The structure was dully completed in 1880 and opened around 1888.
It isn’t the words tallest obelisk, the one in Texas is.
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