- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alfonso V, King of Aragon, 1396-14581
- Alfonso X, King of Castile and Leon, 1221-12841
- Alliata family1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Alonso de Bracamente1
- Alphabet1
- Alphabet--Religious aspects1
- Alphabet--Religious aspects--Islam1
- Altoviti, Bartolomea1
- Alvarez family1
- Amadori, Bartolomeo1
- Amadori, Niccolo1
- Ambrogio, Leonardo d'1
- Amedei, Bartolomeo1
- Amideo, Chele d'1
- Amthilah al-mukhtalifah1
- Amīr al-Kabīr, Muḥammad ibn Muḥammad, 1742-1817. Majmūʻ fī al-fiqh1
- An authorization to perform a ritual slaughter according to the Jewish law by Avraham Mosheh Leʼon of Carpentras to his son Daniʼel, written on 25 of Tamuz 17641