Author
- Rolandino de' Passaggeri1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Rutilius Taurus Aemilianus Palladius1
- Sacro Regio Consiglio1
- Sallust1
- Salvator Oliva1
- Santa Maria Nuova Hospital1
- Santa Maria in Portico a Fontegiusta1
- Sebastian Schindler1
- Senate of the Republic of Venice1
- Seneca1
- Sicco Polenton1
- Sigismund1
- Signoria of Florence1
- Simon of Cremona1
- Simone di Nicolo Petroni1