In what year was the construction of the new dome completed?

The construction of the new dome of the U.S. Capitol was completed in 1866. This iconic dome, which replaced the original wood-and-lead dome that was built in the early 1800s, was designed by architect Thomas U. Walter and is made of cast iron. The completion of the dome symbolized the growth and stability of the nation during a tumultuous period of history, particularly since it was finished shortly after the end of the Civil War. The dome not only enhances the architectural grandeur of the Capitol building but also stands as a symbol of democracy and the enduring strength of the nation.