- 1571-18781
- 1648-16871
- Abbots--Appointment, call, and election1
- Abridgments1
- Academic theses1
- Acciaioli, Antonio1
- Acciaioli, Francesco1
- Acciaiuoli, Roberto, 1467-15471
- Administration of estates1
- Agazaria, Claudio Boncompagni di1
- Akhḍarī, ʻAbd al-Raḥmān ibn Muḥammad, 1512 or 1513-1575 or 1576. Sullam al-murawniq fī al-manṭiq1
- Albizzi, Costanza1
- Alchemy1
- Alchemy--Manuscripts1
- Alfonso V, King of Aragon, 1396-14581
- Alfīyat al-ʻIrāqī (ʻIrāqī, ʻAbd al-Raḥīm ibn al-Ḥusayn)1
- Alphabets1
- Altoviti, Bartolomea1
- Alvarez family1
- Amadori, Bartolomeo1