John Joseph Krol was an American prelate of the Catholic Church. He was Archbishop of Philadelphia from 1961 to 1988, having previously served as an auxiliary bishop of the Diocese of Cleveland (1953–1961), and was elevated as a cardinalate in 1967 by Pope Paul VI.

The Metropolitan Archdiocese of Philadelphia is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in southeastern Pennsylvania in the United States.