Author
- Regiomontanus1
- Richard Carmarden1
- Richard Robinson1
- Richard Ward1
- Ro. Ba1
- Robert Fabyan1
- Robert Reade1
- Rodolfo Pio da Carpi1
- Roman Catholic Archdiocese of Siena1
- Royal Chancellery of Granada1
- Rudulphus Bollartus1
- Rui de Pina1
- Safi al-Din al-Urmawi1
- Salomon Trismosin1
- Sangalletti family1
- Santa Maria degli Alberighi1
- Scipione Bargagli1
- Sebastian Schindler1
- Senate of the Republic of Venice1
- Sigmund Hintterkircher1