Author
- Roman Catholic Archdiocese of Siena1
- Sarrazius de Bethencourt1
- Seigneury de Brousses1
- Seneca1
- Serapion the Younger1
- Shams al-Dīn al-Samarqandī1
- Sharif al-Murtadha1
- Shaykh Tabarsi1
- Shlomo ben Aderet1
- Shāfiʻ ibn ʻaly1
- Stephanus Hugoneti1
- Taddeo Alderotti1
- Taftazani1
- Tengoccio d'Enea de Piccolomini1
- Thiebaus de Maliers1
- Thomas Brooke1
- Thomas of Capua1
- Thomas of Celano1
- Titus Livius1
- Università de' mercanti (Siena)1