Sisto Fabri served as professor of theology at the Santa Maria sopra Minerva "studium" in the mid 1550s. In 1585 Fabri, who was Master of the Order of Preachers from 1583-1598 would undertake a reformation of the program of studies for the Order and for the "studium" which had been transformed into the College of St. Thomas in 1577. Fabri's reform included a nine-year formation program consisting of two years of logic using the "Summulae logicales" of Peter of Spain alongside Aristotle's logic, three years of philosophy including the study of Aristotle's "De anima", "Physica", and "Metaphysica", and four years of theology using the third part of Aquinas' "Summa" for speculative theology, and the second part for moral theology. Fabri also established a professorship for the study of Hebrew at the College.