DECIO, FILIPPO. — Canonist, born in Milano in 1454, died perhaps in Siena around 1536. He was first a student and then a professor of canon and civil law at Pisa; he subsequently taught at Siena, Padova, Pavia, Pisa, and again at Siena. Leo X, formerly his pupil, had absolved him from the excommunication imposed on him by Julius II for having promoted an assembly of cardinals in favor of Luigi XII.
He left writings on canon law, among which the Commentaria in decretales (Lione 1540 ff.; Roma 1579; Venezia 1599) achieved particular renown; he nevertheless became even more celebrated for his art of teaching.
BIBL.: J. F. Schulte, Geschichte der Quellen und Literatur des can. Rechts, II, Stuttgart 1880, p. 361; B. Kurtscheid and F. A. Wilches, Historia iuris canonici, I, Roma 1943, p. 269; A. Van Hove, Prolegomena, 2nd ed., Malines-Roma 1945, pp. 499, 506, 508, 521. Alberto Scola