- Alessandri, Pietro degli2
- Alessandro, Pietro di1
- Alexander Balas, King of Syria, -145 B.C.1
- Alexander III, Pope, -11812
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alexander, the Great, 356 B.C.-323 B.C.9
- Alfonso V, King of Aragon, 1396-14581
- Algeria--Hippo (Extinct city)3
- Allegory3
- Alliata family1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Almanacs3
- Alphabets4
- Altoviti, Bartolomea1
- Alum tawed bindings3
- Alum tawed thongs (Bindings)1
- Amadori, Lorenzo1
- Ambassadors3
- Ambrogio, Leonardo d'1
- Ambrose, Saint, Bishop of Milan, -3971