Author
- Prince-Bishopric of Toul1
- Priscian1
- Pseudo-Augustine1
- Ptolemaeus Tancredius1
- Ramon Llull1
- Ranuccio Farnese1
- Rapolano Terme1
- Raymond of Penyafort1
- Raymond of Sabunde1
- Ressani family1
- Richard Burdet1
- Richard II of England1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Sacro Regio Consiglio1
- Santa Maria in Portico a Fontegiusta1