- Abbots--Appointment, call, and election1
- Accademic fiorentina1
- Acciaiuoli, Roberto, 1467-15471
- Administration1
- Aegidius, Saint, Abbot1
- Africa1
- Africa--Atlantic Coast1
- Agriculture1
- Agustín, Antonio, 1517-1586. Dialogos de medallas inscriciones y otras antiguedades1
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi, Costanza1
- Alchemy--Manuscripts1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11811
- Alfonso II, King of Naples, 1448-14951
- Amadori, Bartolomeo1
- Amadori, Lorenzo1
- Amadori, Niccolo1
- Angelio family1
- Angels1