Former Owner
- Laurence William Hodson1
- Leicester Harmsworth3
- Leo Olschki2
- Leonardo Bruni1
- Leonello d'Este, Marquis of Ferrara1
- Liechtenstein State Library1
- Little family1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Lorenzo Berdute1
- Louis César de La Baume Le Blanc1
- Louis Hercule Timoléon de Cossé-Brissac1
- Louis Jean Gaignat1
- Louis XII of France1
- Louis de Gruuthuse2
- Lucien Delamarre1
- Lucien Graux1
- Luigi Celotti4
- Luis Escobet1
- Lycée Louis-le-Grand1
- Mademoiselle de Malberghe1