Author
- Robert de Sorbon1
- Roberto Caracciolo1
- Rodolfo Pio da Carpi1
- Roger Alban1
- Roger Bigod, 2nd Earl of Norfolk1
- Rogerius1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Rudulphus Bollartus1
- Sacro Regio Consiglio1
- Salvator Oliva1
- Santa Maria in Portico a Fontegiusta1
- Sensatus1
- Serapion the Younger1
- Sextus the Pythagorean1
- Sicco Polenton1
- Sidonius Apollinaris1