Construction on the White House (then called the "President's House") was begun in 1792. Washington laid the cornerstone for the United States Capitol (then called the "Congress House") on September 18, 1793. John Adams, Washington's successor, moved into the White House in November 1800; that same month, Congress held its first session in the Capitol. The following February, Congress approved the District of Columbia Organic Act of 1801, which officially organized the District of Columbia, and, in accordance with the Constitution, named Congress as its exclusive governing authority.