Author
- Ranuccio Farnese1
- Rasūl ibn Ṣāliḥ Āydīnī1
- Regiomontanus1
- Republic of Venice1
- Ressani family1
- Richard Ward1
- Ro. Ba1
- Robert Beale1
- Robert Cooke1
- Robert Fabyan1
- Rodrigo de Rueda1
- Roman Catholic Archdiocese of Siena1
- Roman Rota1
- Sadid al-Din al-Kazaruni1
- Safi al-Din al-Urmawi1
- Salmūn ibn ʻAlī Kinānī1
- Sam Mirza1
- Sanai1
- Sangalletti family1
- Santa Maria degli Alberighi1