- Leo III, Pope--Enchiridion.1
- Leo XI, Pope, 1535-16051
- Library catalogs1
- Ligio, Leonardo di1
- Literature, Medieval1
- Local government--Law and legislation1
- Local officials and employees1
- Logic, Medieval1
- Lombards1
- Lord's Supper1
- Lord's Supper--Adoration1
- Lorenzo, Giovanni Battista di1
- Lotti, Piero1
- Louis IX, King of France, 1214-12701
- Love poetry, Classical1
- Lucan, 39-651
- Ludovico Sforza, Duke of Milan, 1452-15081
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Luti, Lutoccio1
- Machiavelli family1