Also known as Old Ironsides, the USS Constitution happens to be the ancient commissioned vessel having to the United States Navy that stays afloat and in service. Directly across from the vessel, in Building 22, is the USS Constitution Museum that offers the public an opportunity to learn inside and out about its history and heritage. The USS Constitution that is situated at Pier One, Charlestown Navy Yard, happens to be a significant historical site towards the finish of the Freedom Trail that speaks volumes about the Navy and the city's part in the numerous wars.