- Litanies--Catholic Church1
- Literature, Medieval1
- Little office of the Blessed Virgin Mary (Catholic Church)1
- Liturgics--Calendar1
- Liturgy of the hours (Catholic Church)1
- Logic, Medieval1
- Love poetry, English (Middle)1
- Love poetry, Latin1
- Love songs1
- Low German language1
- Luke, Saint1
- Luxembourg1
- Lydgate, John, 1370?-1451?1
- Mabādiʼ fī al-taṣrīf (Zanjānī, ʻAbd al-Wahhāb ibn Ibrāhīm)1
- Magic--Religious aspects--Christianity1
- Mahdi1
- Maimonides, Moses, 1135-12041
- Malchus, Saint1
- Mameluke illumination of books and manuscripts1
- Mamelukes1