The SS Jeremiah O'Brien is one of two remaining fully functional Liberty ships of the 2,710 built and launched during World War II. The O'Brien has the distinction of being the last unaltered Liberty ship and remains historically accurate. Moored at Pier 45, Fisherman's Wharf, she is a premier San Francisco attraction. A living museum on the National Register of Historic Places and a National Historic Landmark, the O'Brien transports you back almost seven decades to when sailors braved the harshest of high seas and threat of enemy attack. Our Mission: The mission of the National Liberty Ship Memorial is to restore, promote and operate the Liberty Ship, SS Jeremiah O'Brien, as a living museum. The goal of this mission is to preserve, for present and future generations, the story of the patriotic and brave men and women who built, sailed and defended the 2,751 American-built World War II ships known as "Liberties."