Title
- Medieval manuscript fragment18
- Meditations1
- Miscellany10
- Missal41
- Monastic rule1
- Mukhtaṣar Uktuwaykhūs1
- New Testament1
- Obituaries1
- Office2
- Office of the Dead3
- Offices3
- Officium dicendum in ecclesiola supra illos, qui damnati sunt ad mortem1
- Omnis mortalium cura3
- Opuscula2
- Orations1
- Ordinal2
- Ordinances3
- Papal bull6
- Papal diaries1
- Papal documents1