Author
- John Capgrave1
- John Chrysostom1
- John Gower1
- John Mandeville1
- John XXII1
- John of Genoa1
- John of Seville ?1
- Jordan von Quedlinburg1
- Kingdom of Naples1
- Leo I1
- Leon Battista Alberti1
- Louis XII of France1
- Luca Pacioli1
- Malavolti family1
- Martin V1
- Matthew Paris1
- Matthias von Liegnitz1
- Maximus of Turin1
- Medingen Abbey1
- Mehmed II1