Gregory, IX, Pope, approximately 1170–1241: Decretales [Latin]
- Manuscripts:
-
- Christ Church MS. 378 — Composite manuscript
- MS. Add. A. 188 (Digital facsimile online) — Composite manuscript
- MS. Arch. Selden. B. 51 — 13th century, second half; England
- MS. Bodl. 639 — 13th century, second half; French
- MS. Bodl. 760 — Composite manuscript
- MS. Bodl. 975 — Composite manuscript
- MS. Canon. Misc. 492 (Selected pages online) — 14th century, end; Italian, Bologna
- MS. Canon. Misc. 496 — 14th century, beginning; Italian, Bologna
- MS. Lat. misc. a. 3 — Composite manuscript
- MS. Lat. misc. b. 25 — Composite manuscript
- MS. Lat. misc. b. 26 — Composite manuscript
- MS. Lat. th. b. 4 (Selected pages online) — 1241; Italian, Modena or Bologna
- MS. Lat. th. d. 32 (Selected pages online) — 14th century, beginning; French
- MS. Laud Misc. 32 (Digital facsimile online) — s. xiii2; Germany
- St John's College MS 235 (fragment 96) — s. xiv.; Italy
- St John's College MS 235 (fragments 100 and 101) — the text s. xiii2; the gloss s. xiii/xiv; England
The above references reflect only the current coverage of the online catalogue and may not be comprehensive.