- Juana, of Austria, Princess of Portugal, 1535-15731
- Judas Iscariot1
- Jugurthine War (111-105 B.C.)1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Land grants1
- Latin language--Grammar1
- Latin language--Study and teaching1
- Latin language--Style1
- Latin language--Synonyms and antonyms1
- Latin literature, Medieval and modern1
- Latin poetry1
- Latin poetry, Medieval and modern1
- Laudatory poetry1
- Legal documents1
- Legends1
- Letters, Papal1
- Lilium medicinae (Bernard, de Gordon)1
- Literature, Medieval1
- Lord's Supper1
- Lord's Supper--Catholic Church1