Author
- Pseudo-Cicero1
- Pseudo-Joachim of Fiore1
- Ptolemaeus Tancredius1
- Qasem-e Anvar1
- Qutb al-Din Razi1
- Rashe Menaḥem be Yehoshuʻa, ha-Golah1
- Regiomontanus1
- Republic of Venice1
- Revanî1
- Robert Cooke1
- Rodolfo Pio da Carpi1
- Safi al-Din al-Urmawi1
- Salmūn ibn ʻAlī Kinānī1
- Samarqandī, Muḥammad ibn Maḥmūd1
- Sanai1
- Santa Maria degli Alberighi1
- Sebastian Schindler1
- Severian of Gabala1
- Shahidi Ibrahim Dede1
- Shams al-Dīn Shāfiʻī1