Title
- Registrum alphabeticum1
- Registrum ordinis Cysterciensis1
- Regula1
- Regulae1
- Responsa1
- Risālah al-muʻīnīyah fī al-hayʼah ... [etc1
- Risālah fī al-hayʼah al-falakīyah1
- Risālah fī al-waqf1
- Risālah fī ādāb al-baḥth1
- Risālah fī ʻilm al-hayʼah1
- Ritual1
- Roman ceremonials1
- Roman de Mandevie1
- Roman de la rose1
- Romuleon1
- Rozier des guerres1
- Rubaiyat1
- Rubricae1
- Rubāʻīyāt-i Shaykh Awḥad al-Dīn Kirmānī1
- Rule of Saint Clare1