The Diocese grew under the successive leadership of Bishops John Barrett Kerfoot, Cortland Whitehead, Alexander Mann, Austin Pardue, and Robert Appleyard and developed several notable institutions: St. Margaret's Hospital, the Church Home (later Canterbury Place), St. Barnabas Community, and Sheldon Calvary Camp. The diocese was known for its work among miners and steelworkers, and as the steel industry began its collapse in Pittsburgh offered a variety of programs supporting workers. However, evangelicals targeted the diocese as the location for a new seminary, Trinity Episcopal School for Ministry, and spent much of the 1970s pushing the diocese towards the theological position favored by that group. By the 1990s they had changed the theological mix of the diocese. Under Bishops Alden Hathaway and Robert Duncan, St. Margaret's Hospital and Canterbury Place were turned over to control of UPMC; St. Barnabas was released to an independent non-denominational board; Sheldon Calvary Camp became the last diocesan institution with a board closely tied to the diocese.