Founded in 1960 as the Philadelphia Maritime Museum, Independence Seaport Museum (ISP) is a repository of art, artifacts, and archival materials documenting the diverse maritime history of the Greater Delaware Valley, and the history of major urban ports of the Delaware River. ISP also houses one of the largest collections of maritime art and artifacts in the country, and it operates the National Historic Landmark ships Cruiser Olympia and Submarine Becuna.
