Notable alumni and faculty
Gregorian's alumni include 17 popes, such as Pope Gregory XV, Pope Urban VIII, Pope Innocent X, Pope Clement XI, Pope Leo XIII, Pope Pius XII, Pope Paul VI, and Pope John Paul I. Eight of the last eleven popes were alumni of the Gregorian. Other students include 72 saints and beatified persons including Saint Robert Bellarmine, Saint Aloysius Gonzaga and Saint Maximilian Kolbe. Former Gregorian professors include Joseph Ratzinger, later Pope Benedict XVI, a visiting professor in the faculty of theology from 1972 to 1973.
Gregorian alumni and professors include:
Bartholomew I, Greek Ecumenical Patriarch of Constantinople and New Rome
Mar Joseph Kallarangatt, Indian theologian and bishop of the Syro-Malabar Catholic Eparchy of Palai
Simona Brambilla, Italian nun and member of Congregation for Institutes of Consecrated Life and Societies of Apostolic Life
Roger Boscovich, Ragusan Jesuit priest, physicist and mathematician
David Cairns, Scottish politician
Christopher Clavius, German Jesuit priest and inventor of the Gregorian calendar
Brenda Dolphin, psychologist, Sister of Mercy and Postulator for the Cause of Catherine McAuley
Friedrich Dörr, German priest, professor and hymnwriter
Jules Mazarin, French cardinal and prime minister to the French monarchy
Joseph Perumthottam, Indian Metropolitan of the Syro-Malabar Catholic Archeparchy of Changanacherry
Reginald Foster, American priest, Latinist and professor
Filippo Grandi, Italian Commissioner-General of UNRWA
Peter Henrici, Swiss Jesuit priest, philosopher and Auxiliary Bishop of Chur
Wilhelm Imkamp, German priest, theologian and professor
Francesco Lana de Terzi, Italian Jesuit priest and aeronautics scientist
Bernard Lonergan, Canadian Jesuit priest, philosopher, theologian and economist
Heinrich Maier, Austrian priest and resistance fighter against Nazi Germany
Mary McAleese, former President of Ireland
John Navone, American Jesuit priest, professor, theologian and author
Denis Fahey, Irish priest and theological writer
Athanasius Kircher, German Jesuit priest, scholar and polymath
Hans Küng, Swiss priest and theologian
Charles Curran, American priest and moral theologian
Vincenzo Riccati, Venetian Jesuit priest and inventor of hyperbolic functions
Luca Valerio, Italian Jesuit priest and mathematician
Paul Guldin, Swiss Jesuit priest, mathematician and astronomer
Óscar Romero, Salvadoran archbishop and activist
Gian Vittorio Rossi, Italian poet, philologist and historian
Andrea Salvadori, Italian poet and librettist
Henricus Smeulders, Belgian Procurator General of the Cistercian Order
John Wijngaards, Dutch theologian and former priest
James V. Schall, American Jesuit priest, writer, philosopher and professor
Francis A. Sullivan, American Jesuit priest, theologian and professor
Anderson Sunda-Meya, Congolese-American physicist and educator
David Tracy, American priest, theologian and professor
Niccolò Zucchi, Italian Jesuit priest, astronomer and physicist
Patrick Augustine Kalilombe, Malawian theologian and Bishop of Lilongwe
Samuel Ruiz, Mexican theologian and bishop of San Cristóbal de Las Casas
Ademar Agostinho Sauthier, Brazilian theologian
Sandra M. Schneiders, American theologian, writer and professor
Princess India of Afghanistan
Mary Milligan, theologian and professor. First woman to graduate from the Gregorian
Paolo Benanti, Franciscan priest, theologian and professor
Aquilino Cayuela, Spanish writer and professor specializing in moral philosophy, politics, bioethics, and theology
Giovanni Cesare Pagazzi, titular archbishop of Belcastro
Anthony Kenny, philosopher
The majority of the church's leaders graduated from the Gregorian; one-third of the current College of Cardinals studied there at one time or another, and more than 900 bishops worldwide are among its 12,000 living alumni.