George Washington helped lay the cornerstone on September 18, 1793. William Thornton designed the original building.
On August 24, 1814, British troops burned the Capitol during the War of 1812. It was repaired and the work was finished by 1826.
The cast-iron dome you see now was designed by Thomas U. Walter. The decision to replace the old dome was made in 1855, and it was finished around 1866. The Capitol is the meeting place of the U.S. Congress.

