Author
- Robert Grosseteste1
- Roger Bigod, 2nd Earl of Norfolk1
- Roger Waltham1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Sacro Regio Consiglio1
- Santa Maria in Portico a Fontegiusta1
- Sebastian Schindler1
- Senate of the Republic of Venice1
- Seneca1
- Serapion the Younger1
- Sextus the Pythagorean1
- Sigismund1
- Signoria of Florence1
- Sixtus IV1
- Society of Jesus1
- Society of Saint Anne (Malogoszcz, Poland)1