Author
- Pierre Choisnet1
- Pietro Candido Decembrio1
- Pietro d'Abano1
- Podestà of Monterubbiano (Italy)1
- Podestà of Perugia1
- Polo, Marco, 1254-1323?1
- Priori (Florence)1
- Pseudo-Augustine1
- Pseudo-Dionysius the Areopagite1
- Pseudo-Hegesippus1
- Qaitbay1
- Raimondo Marliani1
- Rapolano Terme1
- Rashid-al-Din Hamadani1
- Raymond of Penyafort1
- Richard Bolter1
- Richard Burdet1
- Richard Nykke1
- Robert de Saint-Martin1
- Roman Catholic Archdiocese of Siena1