Author
- Raymond of Sabunde1
- Rayḥān Āghā ibn ʻAbd Allāh1
- Razi al-Din ibn al-Hanbali1
- Refaʼel di Fontanella1
- Refiʻı̂1
- Republic of Venice1
- Richard Bolter1
- Richard Burdet1
- Richard Ward1
- Robert Cooke1
- Robine Bordinelle1
- Rolandino de' Passaggeri1
- Roman Catholic Archdiocese of Mainz1
- Roman Catholic Archdiocese of Siena1
- Roman Catholic Diocese of Regensburg1
- Royal Chancellery of Granada1
- Rutgerus Hartman1
- Rājiḥ ibn Ismāʻīl Ḥillī1
- Rāmacandra1
- Rūmī, Bāyazīd ibn Yūsuf, d. 1494 or 51