- Agnes, Saint, Martyr1
- Agni (Hindu deity)6
- Agnihotra (Hindu rite)11
- Agniṣṭoma (Hindu rite)3
- Agreda, Dominici d'1
- Agriculture7
- Agriculture--Economic aspects2
- Agriculture--Religious aspects--Hinduism2
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)7
- Akbar, Emperor of Hindustan, 1542-16051
- Akhlāq al-ʻAḍudīyah (Ījī, ʻAḍud al-Dīn ʻAbd al-Raḥmān ibn Aḥmad)1
- Akhṣar al-mukhtaṣarāt (Ibn Balabān, Muḥammad ibn Badr al-Dīn)1
- Alban, Saint, -304?1
- Alberto, Alberto di2
- Albertus de Fontanella1
- Albigenses1
- Albizzi family1
- Albizzi, Costanza1
- Alchemy22
- Alchemy--Bibliography1