Title
- Oculus sacerdotis1
- Office1
- Officii et magistrati1
- Omnes ad praeda venient1
- Omnis mortalium cura1
- On charms and talismans1
- Orations1
- Ordo judicarius1
- Organon1
- Ottoman Turkish expansion on qaṣīdat al-Burdah1
- Paludi pontine1
- Pand-i ʻAṭṭār1
- Panormia1
- Papal diaries1
- Paschale carmen1
- Passio sancti Blasii1
- Passione del nostro signore1
- Pawilhar1
- Penitential Psalms1
- Pentateuch1