When was the original dome of the Capitol building completed?

The original dome of the Capitol building was completed in 1824. This dome was constructed as part of the ongoing development of the Capitol, which had begun its construction in 1793. The Capitol building has undergone numerous renovations and expansions since its initial design, including significant changes to the dome itself. Upon its completion in 1824, the dome was an important architectural feature that contributed to the building's iconic status.

The period during which the original dome was built was instrumental in solidifying the Capitol as the centerpiece of American democracy. Its design reflected the neoclassical architectural style that was prevalent in the early 19th century and served to symbolize the strength and permanence of the U.S. government.

Other options represent years that either precede or follow the actual completion of the dome, but 1824 is the correct date that marks this significant milestone in the Capitol's history.