Gregory IX, Pope, approximately 1170-1241, “Decretales cum glossa [folium 80],” Digital Collections, accessed December 12, 2025, https://digitalcollections.library.gvsu.edu/document/40097.
One leaf from Decretales cum glossa by Pont. Max. Gregorius IX. Printed in Basel by Michael Wenssler in 1486. Illustrated with red rubricated initials. [GW 11472; ISTC ig00460000]