Author
- Pierre Mésenge1
- Pius IV1
- Pope1
- Ranieri Farnese1
- Regiomontanus1
- Richard Carmarden1
- Richard Ward1
- Robert Reade1
- Rodrigo de Rueda1
- Roman Catholic Archdiocese of Siena1
- Royal Chancellery of Granada1
- Rudulphus Bollartus1
- Rui de Pina1
- Salomon Trismosin1
- Scipione Bargagli1
- Sebastião Lopes1
- Senate of the Republic of Venice1
- Simon Canu1
- Simon de Bon1
- Sixtus V1