- Albizzi family1
- Alfonso X, King of Castile and Leon, 1221-12841
- Alvarez family1
- Ambassadors1
- Anjou dynasty, 1268-14421
- Arabic alphabet1
- Arabic language--Figures of speech1
- Arabic language--Inflection1
- Arabic language--Semantics1
- Arabic language--Synonyms and antonyms1
- Arithmetic1
- Armayūnī, Yūsuf ibn ʻAbd Allāh, -15511
- Armorial bookplates1
- Armorial stamps1
- Ashkenazi, Ẓevi Hirsch ben Jacob, -17181
- Astrology, Arab1
- Athīr al-Dīn al-Abharī, al-Mufaḍḍal ibn ʻUmar, -1265. Hidāyat al-ḥikmah1
- Auctions1
- Austria--Vienna1
- Bacán, Hernando de1