- Rhetoric, Ancient--Study and teaching1
- Rhetoric--Study and teaching1
- Rhetorica ad Herennium1
- Rithmomachia (Game)1
- Roman law1
- Romances1
- Romans--Religion1
- Rucellai, Cosimo, 1495-15191
- Sacraments1
- Salt industry and trade--Law and legislation1
- Sammelbands1
- Satire, Greek1
- Satire, Latin1
- Satirical literature1
- Science1
- Seneca, Lucius Annaeus, approximately 4 B.C.-65 A.D.1
- Sententiarum libri IV (Peter Lombard, Bishop of Paris)1
- Sermons, Spanish1
- Sibyls1
- Siege of Istanbul (Istanbul, Turkey : 1453)1