Author
- Pseudo-Hegesippus1
- Pseudo-Joachim of Fiore1
- Publius Papinius Statius1
- Qaṣabī, Muḥammad ʻUmar1
- Qutb al-Din Razi1
- Ramon Llull1
- Ranulf Higden1
- Raymond of Penyafort1
- Raymond of Sabunde1
- Raymundus de Salgis1
- Regiomontanus1
- Richard Bolter1
- Richard Burdet1
- Richard II of England1
- Richard Nykke1
- Richard Rolle1
- Robert de Saint-Martin1
- Roberto Caracciolo1
- Robine Bordinelle1
- Rocca, Antonio1