- Public law (Roman law)1
- Raolée, Guillaume, active 12541
- Raymond, of Peñafort, Saint, 1175?-12751
- Religious life1
- Religious poetry1
- Rhetoric, Medieval1
- Robert, King of Naples, approximately 1275-13431
- Roman Civil War (Rome : 43-31 B.C.)1
- Roman law1
- Ruch, Georgius, fl. 1438-14411
- Russia1
- Sacrifice--Judaism1
- Saint-Bertin (Monastery : Saint-Omer, Pas-de-Calais, France)1
- Sainte-Chapelle (Paris, France)1
- Saints1
- Saints--Biography1
- Satire, Latin1
- Scanderbeg, 1405?-14681
- Scholia1
- Science, Medieval1