- Alcoholism--Religious aspects--Islam1
- Aldobrandini, Giovanni degli1
- Alessandri, Alessandro degli1
- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alfayn1
- 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
- Almanacs1
- Alonso de Bracamente1
- Alphabet1
- Alphabet--Religious aspects1
- Alphabet--Religious aspects--Islam1
- Altoviti, Bartolomea1
- Alvarez family1
- Amadori, Bartolomeo1
- Amadori, Niccolo1
- Ambrogio, Leonardo d'1