- Regula (Benedict, Saint, Abbot of Monte Cassino)1
- Religious life1
- Rhetoric, Medieval1
- Rites and ceremonies1
- Roman Civil War (Rome : 49-45 B.C.)1
- Roman capitals (Lettering)1
- Rosary1
- Rupert, of Deutz, approximately 1075-11291
- Sacraments--Catholic Church1
- Saint-Victor (Abbey : Paris, France)1
- Salvation1
- Sayings1
- Sequences (Liturgy)1
- Sequences (Music)1
- Sermons, Early Christian1
- Sermons, German1
- Seventeenth century1
- Siege of Istanbul (Istanbul, Turkey : 1453)1
- Sixteenth century1
- Sixtus IV, Pope, 1414-14841