USS Constitution is a wooden-hulled tree-masted heavy frigate of the U.S. Navy, named by President George Washington after the Constitution of the United States. Launched in 1797, she is the world's oldest commissioned naval vessel afloat. The greatest glory for the Constitution came during the War of 1812. Her crew defeated four British frigates during three separate engagements. She earned the nickname 'Old Ironsides' because the cannon fire from enemy ships seemed as if they couldn't penetrate her strong oak hull. Completed puzzle is 5" x 7".