There were actually three ships of the United States Navy that have borne the name USS Constellation, to honor, some say, the "new constellation of stars" on the United States flag. Old vs. New! USS Constellation lies in a berth below Baltimore's World Trade Center. CLICK the Photo to enlarge.Baltimore's "Constellation" was commissioned in 1855; the U.S.S. Constellation was the last all-sail ship built by the United States Navy. Today the historic vessel lies at anchor (figuratively speaking) in Baltimore's Inner Harbor, where visitors can climb aboard and get a firsthand look at what the life of a sailor was like in days past. A knowledgeable and enthusiastic crew of tour guides is ready to answer questions about the ship's history, including its missions to disrupt the slave trade, and its latter role in delivering famine relief supplies to Ireland.