- Arbaʻūn al-Nawawīyah (Nawawī)9
- Archery1
- Arithmetic2
- Ark of the Covenant1
- Armayūnī, Yūsuf ibn ʻAbd Allāh, -15511
- Armenia1
- Armorial bindings1
- Armorial bookplates3
- Asharites1
- Ashbāh wa-al-naẓāʼir (Ibn Nujaym, Zayn al-Dīn ibn Ibrāhīm)2
- Assumption of the Blessed Virgin Mary1
- Astrolabes1
- Astrology, Arab2
- Astronomical instruments5
- Astronomy2
- Astronomy, Arab4
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah1
- Augustine, of Hippo, Saint, 354-4301
- Augustinians1
- Austria1