The Carpenters’ Company of the City and County of Philadelphia is the oldest extant craft guild in the United States. Founded in 1724, the Company consists of nearly 200 prominent Philadelphia area architects, building contractors and structural engineers and has had nearly 900 members in its almost three centuries of existence. The Company built, owns and continues to operate Carpenters' Hall located in Philadelphia's Independence National Historical Park. In 1774 the Hall served as the site of the First Continental Congress.