- 962-12681
- A (The letter)1
- Accademic fiorentina1
- Acciaiuoli, Roberto, 1467-15471
- Aegidius, Saint, Abbot1
- Agriculture--Accounting1
- Agustín, Antonio, 1517-1586. Dialogos de medallas inscriciones y otras antiguedades1
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi family1
- Albizzi, Costanza1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11811
- Alfonso V, King of Aragon, 1396-14581
- Algebra1
- Alliata family1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Altoviti, Bartolomea1
- Amadori, Bartolomeo1
- Amadori, Lorenzo1
- Amadori, Niccolo1