An academy (Greek Ἀκαδημία) is an institution of higher learning, research, or honorary membership. The name traces back to Plato's school of philosophy, founded approximately 385 BC at Akademia, a sanctuary of Athena, the goddess of wisdom, north of Athens, Greece.

The original Academy

main: Platonic Academy Before the Akademia was a school, and even before Cimon enclosed its precincts with a wall (Plutarch Life of Cimon xiii:7), it contained a sacred grove of olive trees dedicated to Athena, the goddess of wisdom, outside the city walls of ancient Athens (Thucydides ii:34). The archaic name for the site was Hekademia, which by classical times evolved into Akademia and was explained, at least as early as the beginning of the 6th century BC, by linking it to an Athenian hero, a legendary "Akademos". The site of the Academy was sacred to Athena and other immortals.

Plato's immediate successors as "scholarch" of the Academy were Speusippus (347-339 BC), Xenocrates (339-314 BC), Polemon (314-269 BC), Crates (ca. 269-266 BC), and Arcesilaus (ca. 266-240 BC). Later scholarchs include Lacydes of Cyrene, Carneades, Clitomachus, and Philo of Larissa ("the last undisputed head of the Academy"). Other notable members of the Academy include Aristotle, Heraclides Ponticus, Eudoxus of Cnidus, Philip of Opus, Crantor, and Antiochus of Ascalon.

The Neoplatonic Academy of Late Antiquity

see: End of Hellenic Religion

After a lapse during the early Roman occupation, the Academy was refounded (Cameron 1965) as a new institution of some outstanding Platonists of late antiquity who called themselves "successors" (diadochoi,, but of Plato) and presented themselves as an uninterrupted tradition reaching back to Plato. However, there cannot have actually been any geographical, institutional, economic or personal continuity with the original Academy in the new organizational entity (Bechtle).

The last "Greek" philosophers of the revived Academy in the 6th century were drawn from various parts of the Hellenistic cultural world and suggest the broad syncretism of the common culture (see koine): Five of the seven Academy philosophers mentioned by Agathias were Syriac in their cultural origin: Hermias and Diogenes (both from Phoenicia), Isidorus of Gaza, Damascius of Syria, Iamblichus of Coele-Syria and perhaps even Simplicius of Cilicia (Thiele).

The emperor Justinian closed the school in AD 529, a date that is often cited as the end of Antiquity. According to the sole witness, the historian Agathias, its remaining members looked for protection under the rule of Sassanid king Khosrau I in his capital at Ctesiphon, carrying with them precious scrolls of literature and philosophy, and to a lesser degree of science. After a peace treaty between the Persian and the Byzantine empire in 532 guaranteed their personal security (an early document in the history of freedom of religion), some members found sanctuary in the pagan stronghold of Harran, near Edessa. One of the last leading figures of this group was Simplicius, a pupil of Damascius, the last head of the Athenian school. The students of the Academy-in-exile, an authentic and important Neoplatonic school surviving at least until the 10th century, contributed to the Islamic preservation of Greek science and medicine, when Islamic forces took the area in the 7th century (Thiele). One of the earliest academies established in the east was the 7th century Academy of Gundishapur in Sassanid Persia..