Author
- Ranuccio Farnese1
- Regia Camera (Duchy of Milan)1
- Regiomontanus1
- Ressani family1
- Richard Brooke1
- Richard Ward1
- Robert Reade1
- Rodolfo Pio da Carpi1
- Roger Alban1
- Roman Catholic Archdiocese of Siena1
- Rudulphus Bollartus1
- Sebastian Schindler1
- Senate of the Republic of Venice1
- Society of Jesus1
- Society of Saint Anne (Malogoszcz, Poland)1
- Stefano d'Andrea1
- Stephan Brechtel1
- Stephen Batman1
- Suetonius1
- Tartaleoni family1