- Academic theses1
- 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
- Akhḍarī, ʻAbd al-Raḥmān ibn Muḥammad, 1512 or 1513-1575 or 1576. Sullam al-murawniq fī al-manṭiq1
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi, Costanza1
- Alchemy--Manuscripts1
- Alexander III, Pope, -11811