- Robert, King of Naples, approximately 1275-13431
- Rochefort Demoulin, Louis1
- Roger, of St. Albans1
- Roman law1
- Royal supremacy (Church of England)1
- Ruch, Georgius, fl. 1438-14411
- Rustam (Legendary character)1
- Sacraments--Catholic Church1
- Sacrifice--Judaism1
- Saint-Bertin (Monastery : Saint-Omer, Pas-de-Calais, France)1
- Sainte-Chapelle (Paris, France)1
- Saints--Biography1
- Salat1
- Samson (Biblical judge)1
- Sanskrit language--Grammar1
- Satire, Latin1
- Saudi Arabia--Mecca1
- Saudi Arabia--Medina1
- Scanderbeg, 1405?-14681
- Schweinitz (Germany)1