- Administration1
- Administration of estates1
- Adrian VI, Pope, 1459-15231
- Afghanistan--Herat1
- Agazaria, Claudio Boncompagni di1
- Agustín, Antonio, 1517-1586. Dialogos de medallas inscriciones y otras antiguedades1
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albizzi, Costanza1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11811
- Alfonso X, King of Castile and Leon, 1221-12841
- Amadori family1
- Amadori, Francesco1
- Anaya, Diego de1
- Andrea, Michele di1
- Andreucci, Bartolomeo1
- Andronicus II Palaeologus, Emperor of the East, 1260-13321
- Anjou, François, duc d', 1554-15841
- Annunciation to the Blessed Virgin Mary1
- Anwār al-tanzīl wa-asrār al-taʼwīl (Bayḍāwī, ʻAbd Allāh ibn ʻUmar)1