The Archdiocese of Philadelphia is the oldest diocese in the United States, founded in 1808. It is the metropolitan see of the ecclesiastical province of Philadelphia, which includes the dioceses of Allentown, Altoona-Johnstown, Erie, Greensburg, Harrisburg, Pittsburgh, and Scranton. The Archdiocese of Philadelphia serves over 1.3 million Catholics in the Philadelphia area. The archdiocese operates over 200 parochial schools, 4 high schools, and 17 special education schools. It also operates Catholic Social Services, which provides a wide range of social services to the community, including adoption services, counseling, and senior services.