29 June 1923 on the occasion of the sixth centenary of the canonization of Thomas Aquinas Pius XI's encyclical "Studiorum ducem" singled out the Pontifical Angelicum College as the official "sedes Thomae":It will be fitting...that the institutes where sacred studies are cultivated express their holy joy, before all the Pontifical Angelicum College where Thomas could be said to dwell in his own house, and then all the other ecclesiastial schools that are in Rome. The reputation of the College during this period was summed up by one of the "Angelicum's" most illustrious alumni and faculty members in the mid-twentieth century, Cornelio Fabro, who called the "Angelicum" the "avant-garde of the doctrinal mission of the Dominican Order in Rome, and of traditional Thomism whose distinguished exponents included T. Zigliara, A. Lepidi, T. Pègues, E. Hugon, A. Zacchi, R. Garrigou-Lagrange, and M. Cordovani." The notoriety of the College was further fostered by annual celebrations of the Feast of its patron St. Thomas Aquinas including a "preaching tridiuum", a pontifical Mass and an academic symposium at the "Angelicum" 8 June 1923 Szabó founded "Unio thomistica", an association of "Angelicum" students and alumni dedicated to defense of Thomistic doctrine. Its publication originally entitled "Unio thomistica" would continue under the title "Angelicum", a trimesterly journal with articles in Italian, French, English, German, and Spanish treating theology, philosophy, canon law, and social sciences.