The Navy Yard, formerly known as the Philadelphia Naval Shipyard and Philadelphia Naval Business Center, was an important naval shipyard of the United States for over a century. It is now a large industrial park that includes a commercial shipyard, Aker Philadelphia Shipyard. Philadelphia's original navy yard, begun in 1776 on Front Street in what is now the Center City district, was the first naval shipyard of the United States. The new, much larger yard grew up around facilities begun in 1871 on League Island at the confluence of the Delaware and Schuylkill Rivers.