- Arithmetic1
- Ark of the Covenant1
- Armenia1
- Arthurian romances1
- Astarābādī, al-Ḥasan ibn Muḥammad, d. 1315. Wāfīyah fī sharḥ al-Kāfīyah2
- Astrology2
- Astronomy2
- Astronomy, Arab7
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah. Qism al-Ṭabīʻī wa-al-ilāhī1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, d. 1265. Hidāyat al-ḥikmah1
- Auction copies5
- Austria1
- Autographs5
- Avicenna, 980-1037. Ishārāt wal-al-tanbīhāt2
- Avicenna, 980-1037. Qaṣīdah fī al-nafs1
- Avodah (Yom Kippur liturgy)1
- Baldi, Filippo1
- Barberino, Bardo da1
- Bardi, Caterina de'1
- Bardi, Marco de'1