- Liturgy198
- Lives and legends4
- Love-letters1
- Manuscripts2
- Manuscripts, English (Old).1
- Manuscripts, Medieval537
- Manuscripts, Renaissance1
- Mathematics1
- Medicine1
- Medicine, Arab1
- Medicine, Medieval4
- Middle English poetry1
- Missals43
- Mock trials1
- Monasticism and religious orders2
- Music2
- Musical notation3
- Narrative poetry, English (Middle)2
- Neumes10
- Ordinals (Liturgical books)1
Libraries & Collections
- Arts Library
- Bass Library
- Beinecke Library
- Classics Library
- Divinity Library
- Film Study Center
- Fortunoff Archive
- Humanities Collections
- International Collections
- Law Library
- Lewis Walpole Library
- Library Collection Services
- Manuscripts & Archives
- Map Collection
- Marx Science & Social Science Library
- Medical Library
- Music Library
- Sterling Library
- Yale Center for British Art
