- Manuscripts, Latin (Medieval and modern)47
- Manuscripts, Medieval76
- Manuscripts, Persian2
- Manuscripts, Renaissance2
- Marriage--Religious aspects1
- Marriage--Religious aspects--Christianity1
- Missals3
- Missals (Service books)1
- Morale2
- Music--Manuscripts1
- Nativity of Jesus Christ1
- Neumes1
- Oregon--Eugene82
- Papacy1
- Paul, the Apostle, Saint1
- Penance (Canon law)1
- Penitentials1
- Peter Lombard, Bishop of Paris, approximately 1100-1160. Sententiarum libri II1
- Peter, the Apostle, Saint1
- Popes--Primacy1