Author
- Porcellio1
- Prince-Bishopric of Toul1
- Priscian1
- Pseudo-Augustine1
- Ptolemaeus Tancredius1
- Raginaldus Collus Rubeus1
- Ramon Llull1
- Ranuccio Farnese1
- Rapolano Terme1
- Raymond of Penyafort1
- Raymond of Sabunde1
- Regia Camera (Duchy of Milan)1
- Ressani family1
- Richard Burdet1
- Richard II of England1
- Richard Ward1
- Rodolfo Pio da Carpi1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Osma-Soria1