- Acciaioli, Antonio1
- Acciaioli, Francesco1
- Acciaiuoli, Roberto, 1467-15471
- Accounting--Handbooks, manuals, etc.1
- Accounts1
- Acronyms1
- Administration1
- Administration of estates1
- Adrian VI, Pope, 1459-15231
- Advisory opinions (Islamic law)1
- Agazaria, Claudio Boncompagni di1
- Aggada1
- 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
- Alexander III, Pope, -11811
- Alfasi, Isaac ben Jacob, 1013-11031
- Alfonso I King of Asturias, 693-7561