Author
- Richard de Fournival1
- Robert Ashley1
- Roberto Caracciolo1
- Rodolfo Pio da Carpi1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Zaragoza1
- Rutilius Taurus Aemilianus Palladius1
- Sacro Regio Consiglio1
- Sebastian Schindler1
- Sigebert of Gembloux1
- Simon Bredon1
- Simon of Cremona1
- Sixtus IV1
- Society of Jesus1
- Society of Saint Anne (Malogoszcz, Poland)1
- Suetonius1
- Sulpicius Severus1
- Taddeo Alderotti1
- Theophrastus1
- Thomas Rogers1