AMIDANI (or DE AMIDANIS), GUGLIELMO. — An Augustinian religious of the 14th century, born in Cremona and died in Novara in 1355. He was prior general of his Order (1326–42) and bishop of Novara (1342–55). He devoted great activity to the benefit of his religious, promoting studies, enlarging convents (Cremona, Novara), and constructing new ones (Pavia). Numerous dogmatic, exegetical, historical, and rhetorical works remain by him, including: Reprobotio sex errorum sive de auctoritate apostolica; Expositiones super quattuor Evangelia; Commentaria super quattuor libros sententiarum, etc.
BIBL.: D. A. Perini, Bibliographia Augustiniana cum notis biographici. Scriptorum itali, Florence 1931, pp. 28–32.