- Alcaeus
- Alcibiades
- Alcman
- alcoholism
- Alexander the Great
- Alexandria
- Amazons
- Ammianus Marcellinus
- amphitheatres
- Anacreon
- anatomy and physiology
- Andocides
- animals, attitudes to
- animals, knowledge about
- anthropology
- anti-Semitism
- Antigonus Gonatas
- Antigonus the One-eyed (Monophthalmos)
- Antioch
- Antiochus III (‘the Great’)
- Antiphon
- Antoninus Pius
- Antony, Mark
- Aphrodisias
- Aphrodite
- Apollo
- Apollonius of Rhodes
- Apollonius of Tyana
- Appian of Alexandria
- aqueducts
