In October 1958, Cardinal James Francis McIntyre of Los Angeles was in the group of 51 cardinal-electors which selected Pope John XXIII to succeed Pope Pius XII. It was the first papal election in which a cardinal-archbishop from Los Angeles participated in a papal conclave. Since then, Los Angeles cardinals have participated in every conclave, with three from St. John’s Seminary in Camarillo among the 115 in last month’s gathering that produced the election of Pope Francis.Following is a list of conclaves since 1958, with participating U.S. cardinals and their ages in parentheses.—October 25-28, 1958 (51 participating cardinals, elected Pope John XXIII): Francis Joseph Spellman, New York (69); James Francis McIntyre, Los Angeles (72).—June 19-21, 1963 (80, elected Pope Paul VI): Francis Joseph Spellman, New York (74); James Francis McIntyre, Los Angeles (77); Richard James Cushing, Boston (67); Albert Gregory Meyer, Chicago (60); Joseph Elmer Ritter, St. Louis (70).—August 25-26, 1978 (111, elected Pope John Paul I): John Joseph Kroll, Philadelphia (67); John Patrick Cody, Chicago (70); John Francis Dearden, Detroit (70); John Joseph Carberry, St. Louis (74); Terence James Cooke, New York (57); Timothy Manning, Los Angeles (68); Humberto Sousa Medeiros, Boston (62); William Wakefield Baum, Washington (51).—October 14-16, 1978 (111, elected Pope John Paul II): John Joseph Kroll, Philadelphia (68); John Patrick Cody, Chicago (70); John Francis Dearden, Detroit (71); John Joseph Carberry, St. Louis (74); Terence James Cooke, New York (57); Timothy Manning, Los Angeles (68); Humberto Sousa Medeiros, Boston (63); William Wakefield Baum, Washington (51).—April 18-19, 2005 (115, elected Pope Benedict XVI): William Wakefield Baum, Major Penitentiary Emeritus, Apostolic Penitentiary (formerly Washington archbishop, 78); Bernard Francis Law, Archpriest, St. Mary Major Basilica (formerly Boston archbishop, 73); Edmund Casimir Szoka, president, Governate of Vatican City State (formerly Detroit archbishop, 77); Roger Michael Mahony, Los Angeles (69); William Henry Keeler, Baltimore (74); Adam Joseph Maida, Detroit (75); Francis Eugene George, Chicago (68); Theodore Edgar McCarrick, Washington (74); Edward Michael Egan, New York (73); Justin Francis Rigali, Philadelphia (70); James Francis Stafford, Major Penitentiary, Apostolic Penitentiary (formerly Denver archbishop, 72).—March 12-13, 2013 (115, elected Pope Francis): Roger Michael Mahony, Los Angeles (77); Francis Eugene George, Chicago (76); Justin Francis Rigali, Philadelphia (70); Sean Patrick O’Malley, Boston (68); Daniel Nicholas DiNardo, Galveston-Houston (63); Donald William Wuerl, Washington (72); Timothy Michael Dolan, New York (63); William Joseph Levada, prefect emeritus, Congregation of the Doctrine of the Faith (formerly Portland and San Francisco archbishop, 76); Raymond Leo Burke, prefect Emeritus, Apostolic Signatura (formerly St. Louis archbishop, 64); Edwin Frederick O’Brien, Grand Master, Holy Spulchre of Jerusalem (formerly Baltimore archbishop, 73); James Michael Harvey, Archpriest, St. Paul-Outside-the-Walls Basilica (63).The first American cardinal to participate in a papal conclave was Cardinal James Gibbons of Baltimore (69), in the July 31-Aug. 4, 1903 conclave that elected Pope Pius X.The Aug. 31-Sept. 3, 1914 conclave that elected Pope Benedict XV included Cardinal John Murphy Farley of New York (72). Cardinal William Henry O’Connell of Boston (54) was unable to participate because he arrived late.The same happened in the Feb. 1-6, 1922 conclave which elected Pope Pius XI, when Cardinals O’Connell (now 62) and Dennis Joseph Dougherty of Philadelphia (56) did not arrive in time. Pope Pius then changed the rules so that a conclave would not begin before all eligible electors had a chance to arrive.In the conclave of March 1-2, 1939 that elected Pope Pius XII, Cardinal O’Connell (now 79) was able to arrive in time and participate, along with Cardinals Dougherty (now 73) and George William Mundelein of Chicago (66).Source: http://www.catholic-hierarchy.org/.{gallery width=100 height=100}gallery/2013/0405/conclaveus/{/gallery}