Author
- Pius II1
- Platonic Academy1
- Podestà of Monterubbiano (Italy)1
- Porcellio1
- Priscian1
- Pseudo-Aristotle1
- Pseudo-Augustine1
- Pseudo-Cicero1
- Pseudo-Seneca1
- Rapolano Terme1
- Rashid-al-Din Hamadani1
- Remigio dei Girolami1
- Reynoldus Romanus1
- Richard Burdet1
- Richard Nykke1
- Richard of Saint Victor1
- Robert de Saint-Martin1
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1