- Justinian I, Emperor of the East, 483?-5652
- Kingdom of God2
- Kings and rulers--Genealogy2
- Kyriales2
- Land titles--Registration and transfer2
- Latin language, Medieval and modern2
- Latin language--Metrics and rhythmics2
- Latin language--Syntax2
- Law reports, digests, etc.2
- Lent2
- Letters patent2
- Little office of the Immaculate Conception2
- Logic, Medieval2
- Loredano, Leonardo, doge of Venice, 1438-15212
- Luca, Jacopo di2
- Manuscripts, Hebrew2
- Manuscripts, Provençal2
- Marriage (Canon law)2
- Martini, Cornelia2
- Martini, Roberto2