William Henry Keeler was an American cardinal of the Catholic Church. He served as Archbishop of Baltimore, Maryland, from 1989 to 2007 and was elevated to the College of Cardinals in 1994. He previously served as Auxiliary Bishop and Bishop of the Diocese of Harrisburg. Keeler was President of the United States Conference of Catholic Bishops from 1992 to 1995.

The Metropolitan Archdiocese of Baltimore is the archdiocese of the Latin Church of the Catholic Church in northern and Western Maryland in the United States. It is the metropolitan see of the Ecclesiastical Province of Baltimore.