Author
- Rodrigo Sánchez de Arévalo1
- Roger Bigod, 2nd Earl of Norfolk1
- Roger Waltham1
- Rogerius1
- Rolandino de' Passaggeri1
- Roman Catholic Archdiocese of Reims1
- Roman Catholic Diocese of Regensburg1
- Rudulphus Bollartus1
- Rutilius Taurus Aemilianus Palladius1
- Salvator Oliva1
- Santa Maria in Portico a Fontegiusta1
- Senate of the Republic of Venice1
- Sensatus1
- Serapion the Younger1
- Sextus the Pythagorean1
- Sidonius Apollinaris1
- Sigismund1
- Signoria of Florence1
- Simon de Lenis1
- Simone di Nicolo Petroni1