Author
- Sebastian Schindler1
- Senate of the Republic of Venice1
- Serapion the Younger1
- Sigismund1
- Signoria of Florence1
- Society of Jesus1
- Society of Saint Anne (Malogoszcz, Poland)1
- Stefano d'Andrea1
- Stephanus Hugoneti1
- Suetonius1
- Sylvester II1
- Taddea Salamon1
- Tartaleoni family1
- Tengoccio d'Enea de Piccolomini1
- Theobaldus Episcopus1
- Thomas Brooke1
- Thomas of Cantimpré1
- Thomas of Capua1
- Umbertus Decembrius1
- University of Padua1