Established by an Act of Congress in 1798, the United States Marine Band is America's oldest continuously active professional musical organization. Its mission is unique—to provide music for the President of the United States and the Commandant of the Marine Corps. President John Adams invited the Marine Band to make its White House debut on New Year's Day, 1801, in the then-unfinished Executive Mansion. In March of that year, the band performed for Thomas Jefferson's inauguration and it is believed that it has performed for every presidential inaugural since. In Jefferson, the band found its most visionary advocate. An accomplished musician himself, Jefferson recognized the unique relationship between the band and the Chief Executive and he is credited with giving the Marine Band its title, "The President's Own."