Author
- Richard de Fournival1
- Richard de Geveldale1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Catholic Archdiocese of Siena1
- Rutilius Taurus Aemilianus Palladius1
- Sancho IV of León and Castile1
- Sarrazius de Bethencourt1
- Seigneury de Brousses1
- Seneca the Elder1
- Serapion the Younger1
- Sextus the Pythagorean1
- Sidrac1
- Siena1
- Sixtus IV1
- Stephanus Hugoneti1
- Sylvester II1
- Taddeo Alderotti1
- Theobaldus Episcopus1
- Theodore of Mopsuestia1
- Thiebaus de Maliers1