Author
- Peter Schmieher1
- Peter Stamler1
- Peter of Bergamo1
- Petrus Apianus1
- Petrus Aureolus1
- Petrus de Braco1
- Philippus Brusserius1
- Priscian1
- Pseudo-Aristotle1
- Pseudo-Augustine1
- Rabanus Maurus1
- Raymond of Sabunde1
- Remigio dei Girolami1
- Reynoldus Romanus1
- Richard of Saint Victor1
- Roman Catholic Archdiocese of Mainz1
- Salomon Trismosin1
- Samson ben Eliezer1
- Samuel Aaron Romanelli1
- Seneca1