Author
- Ranuccio Farnese1
- Regiomontanus1
- Republic of Venice1
- Ressani family1
- Richard Ward1
- Ro. Ba1
- Robert Cooke1
- Robert Fabyan1
- Roman Catholic Archdiocese of Siena1
- Safi al-Din al-Urmawi1
- Samuel Gallico1
- Sanai1
- Sangalletti family1
- Santa Maria degli Alberighi1
- Scipione Bargagli1
- Sebastian Schindler1
- Shams al-Din al-Sakhawi1
- Sharif Radhi1
- Shaykh Tusi1
- Shāh Vajīhuddīn ʻAlavī Gujarātī1