The purpose of the Philadelphia Archdiocesan Historical Research Center (PAHRC) is to collect, preserve, and make available for research the official records of the Archdiocese of Philadelphia and those ancillary records and items that reflect the growth and development of Catholicism within the Archdiocese in accordance with the approved Collection Access Policy. The PAHRC also preserves and makes available to researchers records of the American Catholic Historical Society of Philadelphia, which document the history and culture of Catholicism in the United States.