Author
- Petrus Comestor1
- Petrus de la Cavalleria1
- Philipp Melanchthon1
- Pierre Bersuire1
- Pietro de' Crescenzi1
- Qutb al-Din Razi1
- Rabanus Maurus1
- Ralph of Longchamp1
- Ranulf Higden1
- Republic of Venice1
- Richard Carmarden1
- Richard Robinson1
- Richard Rolle1
- Robert Cooke1
- Robert Fabyan1
- Roger Alban1
- Rutgerus Hartman1
- Samuel Marochitanus1
- Sidrac1
- Silesia1