Author
- Rasūl ibn Ṣāliḥ Āydīnī1
- Razi al-Din ibn al-Hanbali1
- Real Monasterio de Santa Clara1
- Regia Camera (Duchy of Milan)1
- Regiomontanus1
- Revanî1
- Richard Brooke1
- Richard Carmarden1
- Richard Robinson1
- Richard Ward1
- Ro. Ba1
- Robert Beale1
- Robert Fabyan1
- Robert Reade1
- Rodolfo Pio da Carpi1
- Rodrigo de Rueda1
- Roger Alban1
- Roman Catholic Archdiocese of Siena1
- Royal Audiencia of Lima1
- Rudulphus Bollartus1