Author
- Regia Camera (Duchy of Milan)1
- Republic of Venice1
- Richard Burdet1
- Richard II of England1
- Richard Ward1
- Robert Cooke1
- Robert de Saint-Martin1
- Rodolfo Pio da Carpi1
- 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
- Royal Chancellery of Granada1
- Rozanes, Yosef, 15th century1
- Rucidattamiśra1
- Rudradeva1
- Rudradhara1
- Rāghava1