Author
- Qutb al-Din Razi1
- Rafaino Caresini1
- Ralph of Longchamp1
- Ranulf Higden1
- Rashid-al-Din Hamadani1
- Republic of Venice1
- Richard Rolle1
- Robert de Sorbon1
- Robert of Gloucester1
- Roman Catholic Archdiocese of Siena1
- Sarrazius de Bethencourt1
- Seigneury de Brousses1
- Serapion the Younger1
- Shams al-Dīn al-Samarqandī1
- Sharif al-Murtadha1
- Shaykh Tabarsi1
- Shlomo ben Aderet1
- Shāfiʻ ibn ʻaly1
- Stephanus Hugoneti1
- Taddeo Alderotti1