Title
- Risālah bar usṭurlāb1
- Risālah fī al-barāhīn ʻalá masāʼil al-jabr wa-al-muqābalah1
- Risālah fī al-hayʼah al-falakīyah1
- Risālah fī al-ḥisāb1
- Risālah fī ʻilm al-hayʼah1
- Ritual1
- Riḥlah al-Nāṣirīyah1
- Roman ceremonials1
- Roman law1
- Rosarium1
- Rosarium theologiae1
- Rozier des guerres1
- Rubaiyat1
- Rule of Saint Clare1
- Ruralia commoda1
- Sabʻ samavāt li-sirr-i samāʼī1
- Sacra poesis1
- Sacramentary1
- Saint Patrick's Purgatory1
- Salt registers1