Author
- Pseudo-Eusebius of Cremona1
- Pseudo-Jerome1
- Rapolano Terme1
- Rashid-al-Din Hamadani1
- Regiomontanus1
- Remigio dei Girolami1
- Reynoldus Romanus1
- Richard Burdet1
- Richard Nykke1
- Richard Treby1
- Robert de Saint-Martin1
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Rupert, Count Palatine of Simmern1
- Rutilius Taurus Aemilianus Palladius1
- Ruzbihan Baqli1
- Saadi1
- Sacro Regio Consiglio1
- Safi Al-Din Al-Hilli Altaie1