- The man who composed the Star Spangled Banner; a poet and a lawyer. He was at the time detained on a British ship in the harbor. See his entry in the American National Biography.
Below is the entry from Wikipedia.org for Nov. 2005; of course, it may very well contain mistakes. You can see http://www.usflag.org/ for more.
Francis Scott Key (August 1, 1779–January 11, 1843) was an American lawyer and amateur poet. He is buried in Frederick, Maryland and is an alumnus of St. John's College, Annapolis. During the War of 1812, Key was detained on a British ship commanded by Sir Alexander Cochrane during the battle for Fort McHenry in Baltimore, Maryland harbor. Upon seeing the U.S. flag still flying at dawn, he was inspired to write a poem celebrating the American victory. His poem, "The Defence of Fort M'Henry," was later added to the existing music "To Anacreon in Heaven" by the English composer John Stafford Smith, but the combination came to be known as "The Star-Spangled Banner." Under this name, the song was adopted as the American national anthem in 1931.
Key was a collateral ancestor of F. Scott Fitzgerald. His direct descendants include the 1960s style icon Pauline de Rothschild, fabled Vogue magazine editor-in-chief Diana Vreeland, geneticist Thomas Hunt Morgan, and guitarist Dana Key.
The Francis Scott Key Bridge in Washington, DC and the Francis Scott Key Bridge, part of the Baltimore Beltway crossing the outer harbor of Baltimore, Maryland, are named in his honor. The Francis Scott Key Bridge is located at the approximate point where the British anchored to shell Fort McHenry."