Author
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Sacro Regio Consiglio1
- Santa Maria in Portico a Fontegiusta1
- Sebastian Schindler1
- Sebastian of Naples1
- Senate of the Republic of Venice1
- Signoria of Florence1
- Sixtus IV1
- Sixtus V1
- Stefano d'Andrea1
- Sulpicius Severus1
- Tartaleoni family1
- Tengoccio d'Enea de Piccolomini1
- Thomas Brooke1
- Tito Livio Frulovisi1
- University of Padua1
- Vegetius1
- Vigliano d'Asti1