Author
- Roberto Caracciolo1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Catholic Archdiocese of Siena1
- Rupert, Count Palatine of Simmern1
- Rutgerus Hartman1
- Rutilius Taurus Aemilianus Palladius1
- Saadia Gaon1
- Samuel Marochitanus1
- Sancho IV of León and Castile1
- Sarrazius de Bethencourt1
- Saʻīd ibn Hibat Allāh ibn al-Ḥusayn1
- Sebastian Schindler1
- Seigneury de Brousses1
- Serapion the Younger1
- Sextus the Pythagorean1
- Shnorhali Sargis1
- Siena1
- Simon Bredon1
- Simone d' Angelo1
- Sixtus IV1