Enthroned = March 25, 1959 Ended = August 8, 1959 Predecessor = Santiago Copello Successor = Antonio Caggiano Fermín Lafitte (November 2, 1888 – August 8, 1959) was an Argentine Roman Catholic cleric, serving as Archbishop of Córdoba and, briefly, as Archbishop of Buenos Aires.

He later emerged as one of the leading conservatives in the Argentine curia, and following a rift in church–state relations in Argentina in 1954 Lafitte was among the first public figures to organize rallies opposing President Juan Perón's secular reforms.

[2] Lafitte was then appointed Apostolic Administrator of the Archdiocese of Buenos Aires, under its Archbishop, Cardinal Santiago Copello, in 1956.

Pope John XXIII appointed Cardinal Copello to the Apostolic Chancery on May 26, 1959, upon which the office of Archbishop of Buenos Aires automatically passed to Lafitte.

[3] Lafitte was concurrently appointed vicar of the newly created Military Bishopric of Argentina, which has special jurisdiction over members of the Armed Forces.