- Richard III, King of England, 1452-14851
- Riddles, Latin1
- Rites and ceremonies1
- Rites and ceremonies in the Bible1
- Rithmomachia (Game)1
- Rituals (Liturgical books)1
- Rochefort Demoulin, Louis1
- Roger, of St. Albans1
- Roman capitals (Lettering)1
- Roman law--Interpretation and construction1
- Romanesque1
- Romans--Religion1
- Rome (Italy). Maestri delle Strade1
- Rosary1
- Royal supremacy (Church of England)1
- Rucellai, Cosimo, 1495-15191
- Ruch, Georgius, fl. 1438-14411
- Rupert, of Deutz, approximately 1075-11291
- Ruralia commoda (Crescenzi, Pietro de')1
- Sacramentaries1