- Julian, of Eclanum, Bishop, 380-approximately 4551
- Justa, Saint, -approximately 2871
- Leocadia, Saint, -3031
- Malchus, Saint1
- Manicules1
- Manuscript waste1
- Manuscripts1
- Manuscripts, English (Middle)1
- Manuscripts, Spanish1
- Mary, Blessed Virgin, Saint1
- Middle Ages1
- Middle East--Palestine1
- Missouri--Saint Louis1
- Monastic and religious life1
- Monastic and religious life--Early church1
- Monasticism and religious orders1
- Orso, Saint1
- Passion of Jesus Christ1
- Pigskin bindings1
- Pilgrims and pilgrimages1