- Pythagoras and Pythagorean school1
- Qawāʻid al-aḥkām fī maʻrifat al-ḥalāl wa-al-ḥarām (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)1
- Qazwīnī, ʻAlī ibn ʻUmar, 1203 or 4-1276 or 7. Risālah al-shamsīyah fī al-qawāʻid al-manṭiqīyah1
- Qiblah1
- Qur'ans1
- Qurʼanic scholars1
- Quzabnī, Badīʻ ibn Abī Manṣūr, active 13th century. Munyat al-fuqahāʼ.--Abridgment1
- Qānūn fī al-ṭibb (Avicenna)1
- Qāyitbāy al-Maḥmūdī, Sultan of Egypt and Syria, 1412-14961
- Raffaello, Niccolò di1
- Rawḍat al-nāẓir wa-jannat al-munāẓir (Ibn Qudāmah, Muwaffaq al-Dīn ʻAbd Allāh ibn Aḥmad)1
- Real property (Islamic law)1
- Regula (Augustine, of Hippo, Saint)1
- Religious life1
- Religious poetry1
- Renzi, Betto1
- Renzi, Lello1
- Repentance1
- Requesens, Antonio de'1
- Requesens, Berengario de'1