Author
- Robert Cooke1
- Robert de Saint-Martin1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Royal Chancellery of Granada1
- Sacro Regio Consiglio1
- Santa Maria in Portico a Fontegiusta1
- Sarrazius de Bethencourt1
- Sebastian Schindler1
- Seigneury de Brousses1
- Senate of the Republic of Venice1
- Shelomoh ben Eliyah ha-Melamed1
- Signoria of Florence1
- Sixtus V1
- Stefano d'Andrea1
- Suetonius1
- Tartaleoni family1
- Tengoccio d'Enea de Piccolomini1