- Rites and ceremonies1
- Rituals (Liturgical books)1
- Robert, William1
- Roman law--Interpretation and construction1
- Romances, Latin (Medieval and modern)1
- Romanesque1
- Rome (Italy). Maestri delle Strade1
- Rondinelli, Vieri de'1
- Rosary1
- Rosselmini, Giovanni1
- Rosselmini, Gregorio Tommaso1
- Rossi, Giovanni de'1
- Rossi, Girolamo1
- Rossi, Rosso1
- Rucellai, Donato1
- Rucellai, Filippo de'1
- Rucellai, Guglielmo de'1
- Ruffaldi, Domenico1
- Ruralia commoda (Crescenzi, Pietro de')1
- SS. Annunziata (Church : Florence, Italy)1