The U.S. Capitol is shown as having a gray dome at one point; this is correct. The dome is made of iron and was started in the 1850s before the Civil War. Its construction was halted for a year early in the war, for lack of funding, and was finished in 1866, after Lincoln's death. For nearly all of that time, it was its natural gray. As the last step, it was painted white, presumably very close to the completion date.
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05-03-2025 alle ore 08:09