Title
- Ordo dedicationis ecclesiae et altaris1
- Ordo exsequiarum1
- Ordo judiciorum1
- Ordo unctionis infirmorum eorumque pastoralis curae1
- Oreste e Pylade1
- Original leaves from famous Bibles, nine centuries 1121-1935 A.D. ...1
- Orthographia1
- Otia imperialia1
- Ottoman Turkish expansion on qaṣīdat al-Burdah1
- Ottoman letters1
- Ouidius de remediis amoris1
- Ouvrages de joaillerie1
- Oṃ gaṃ1
- Padārthakhaṇḍanavyākhyā tīkā1
- Pahlavi archive1
- Painted manuscript leaves1
- Paks̄adharmatā1
- Pakṣatāgrantha1
- Pakṣatārahasya1
- Pali and Cambodian manuscript1