- Limp bindings1
- Liturgical books3
- Liturgics24
- Manuscript waste1
- Manuscripts1
- Manuscripts, Aramaic1
- Manuscripts, Dutch1
- Manuscripts, Greek2
- Manuscripts, Hebrew2
- Manuscripts, Italian1
- Manuscripts, Latin4
- Manuscripts, Latin (Medieval and modern)38
- Manuscripts, Spanish11
- Mass1
- Mathematics, Greek1
- Missals1
- Monasteries1
- Monasterio de San Jerónimo de Monte Olivete (Sant Pere de Ribes, Spain)1
- Monasterio de San Jerónimo de la Murtra (Badalona, Spain)1
- Monasterio de San Jerónimo del Valle de Hebrón (Barcelona, Spain)1