USS Constellation is a sloop-of-war/corvette, the last sail-only warship designed and built by the United States Navy. She was built in 1854, using materials salvaged from the frigate USS Constellation, which had been disassembled the year before. Despite being a single-gundeck "sloop," she is actually larger than her original frigate build, and more powerfully armed with fewer but much more potent shell-firing guns.