- Jesus Christ1
- Lamucci, Corso1
- Language and languages--Philosophy1
- Latin language, Medieval and modern1
- Latin language, Medieval and modern--Rhetoric1
- Legal maxims (Canon law)1
- Legal maxims (Roman law)1
- Lello, Broccholio di1
- Lello, Tina di1
- Lenzi family1
- Letters, Papal1
- Liber sextus decretalium (Catholic Church)1
- Lorenzo, Vanna di1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manuscripts, Spanish1
- Marriage customs and rites, Medieval1
- Marriage law1
- Martino, Vanni di1
- Mary, Blessed Virgin, Saint1
- Materia medica1