Author
- Ralph of Longchamp1
- Ramon Llull1
- Ranuccio Farnese1
- Raymond of Penyafort1
- Reginold of Eichstätt1
- Ressani family1
- Richard Fishacre1
- Richard Maidstone1
- Robert Holkot1
- Rocca, Antonio1
- Roman Catholic Archdiocese of Siena1
- Roman Rota1
- Rudulphus Bollartus1
- Rutilius Taurus Aemilianus Palladius1
- Sacro Regio Consiglio1
- Samuel Gallico1
- Sangalletti family1
- Santa Maria Nuova Hospital1
- Santa Maria in Portico a Fontegiusta1
- Scipione Bargagli1