Author
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Osma-Soria1
- Roman Catholic Diocese of Regensburg1
- Roman Catholic Diocese of Zaragoza1
- Roman Curia1
- Sacro Regio Consiglio1
- Santa Maria in Portico a Fontegiusta1
- Seneca1
- Sextus the Pythagorean1
- Siena1
- Sigismund1
- Signoria of Florence1
- Sixtus IV1
- Suetonius1
- Taddea Salamon1
- Tiberius Claudius Donatus1
- Uffizio della mercanzia of Florence1
- Umbertus Decembrius1
- Università de' mercanti (Siena)1
- Vegetius1