- Hymns, Latin1
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Islamic calendar1
- Jews--Conversion to Christianity1
- John II, King of Portugal, 1455-14951
- Judaism--Controversial literature1
- Jugurthine War (111-105 B.C.)1
- Kloster Medingen1
- Land tenure1
- Latin poetry1
- Law1
- Le Fèvre, Jean, approximately 1320-approximately 13901
- Leonis, Johannes, -14631
- Marriage1
- Mary Magdalene, Saint1
- Mary, Blessed Virgin, Saint1
- Mary, Blessed Virgin, Saint, in the liturgy1
- Mensural notation1
- Middle East--Palestine1
- Miserere1