1. University of Pennsylvania, Oversize LJS 280 Title: Decretales Gregorii IX Author: Catholic Church Place: France Date: [between 1250 and 1299]
2. University of Pennsylvania, LJS 35 Title: Decretales Gregorii IX Author: Catholic Church Date: between 1240 and 1260.
3. University of Pennsylvania, Oversize Ms. Codex 1059 Title: Decretales Gregorii IX Author: Catholic Church Place: France Date: [between 1280 and 1299]