Author
- Roberto Caracciolo1
- Robine Bordinelle1
- Rocca, Antonio1
- Roger Waltham1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Rozanes, Yosef, 15th century1
- Rupert, Count Palatine of Simmern1
- Rutgerus Hartman1
- Ruzbihan Baqli1
- Saadi1
- Saadia Gaon1
- Sacro Regio Consiglio1
- Safi Al-Din Al-Hilli Altaie1
- Safi al-Din al-Urmawi1
- Samuel Marochitanus1