Thaïs (Greek: Θαΐς) was a famous Greek hetaera who lived during the time of Alexander the Great and accompanied him on his campaigns. She is most famous for instigating the burning of Persepolis. At the time, Thaïs was the lover of Ptolemy I Soter, one of Alexander's generals. It has been suggested that she may also have been Alexander's lover, on the basis of Athenaeus's statement that Alexander liked to "keep Thais with him", but this may simply mean he enjoyed her company. She is said to have been very witty and entertaining. Athenaeus also says that after Alexander's death Ptolemy married Thaïs, who bore him three children.
Burning of Persepolis 
Thaïs apparently came from Athens and accompanied Alexander throughout his campaign in Asia Minor. She came to the attention of history when, in 330 BC, Alexander burned down the palace of Persepolis after a drinking party. Thaïs was present at the party and gave a speech which convinced Alexander to burn the palace. Cleitarchus claims that the destruction was a whim; Plutarch and Diodorus recount that it was intended as retribution for Xerxes' burning of the temple of Athena on the Acropolis in Athens in 480 BC (the destroyed temple was replaced by the Parthenon of Athens).
When the king [Alexander] had caught fire at their words, all leaped up from their couches and passed the word along to form a victory procession in honour of Dionysus. Promptly many torches were gathered. Female musicians were present at the banquet, so the king led them all out for the comus to the sound of voices and flutes and pipes, Thaïs the courtesan leading the whole performance. She was the first, after the king, to hurl her blazing torch into the palace. As the others all did the same, immediately the entire palace area was consumed, so great was the conflagration. It was remarkable that the impious act of Xerxes, king of the Persians, against the acropolis at Athens should have been repaid in kind after many years by one woman, a citizen of the land which had suffered it, and in sport. -Diodorus of Sicily (XVII.72)
People in the palace were given enough time to leave the building; there is no record of loss of life.
It has been argued that Thaïs was at this time Alexander's lover. T.D. Ogden suggests that Ptolemy took her over at some later point, though other writers believe she was always Ptolemy's companion.
Later life 
Thaïs's subsequent career is uncertain. According to Athenaeus, she married her lover Ptolemy, who became king of Egypt, after Alexander's death. Even if they were not actually married, their relationship seems to have acquired "quasi-legal status". She gave Ptolemy three children, two boys and a girl: Lagus, Leontiscus, and Eirene.
Whatever the legal status of their relationship, Thaïs was never portrayed as Ptolemy's queen, nor were her children treated as heirs to his throne. Ptolemy had other wives, first Eurydice of Egypt, and later Berenice I of Egypt, who became his principal consort and mother of his heir.
Thaïs's daughter Eirene married Eunostos, king of Soli, Cyprus. Lagus is known from a reference to his victory in a chariot race in the Lycaea, an Arcadian festival, in 308/307. Leontiscus appears to have been in Cyprus with his sister, as he recorded there as a prisoner taken by Demetrius Poliorcetes in 307 or 306 after his invasion of the island. He was later sent home to Ptolemy.
The date of Thaïs's death is unknown.
Appearances in literature 
Her larger-than-life persona has resulted in characters named Thaïs appearing in several literary works, the most famous of which are listed below. In the post-classical period she is commonly portrayed in literature and art as Alexander's rather than Ptolemy's lover.
In Ovid’s Remedia Amoris (383), Thais is contrasted with Andromache, Andromache being the epitome of the loyal wife, while Thais is taken to be the epitome of sex. Thais, says Ovid, is the subject of his art.
Athenaeus's book The Deipnosophists records a number of remarks attributed to Thaïs. She "said once to a boastful lover of hers, who had borrowed some goblets from a great many people, and said that he meant to break them up, and make others of them, 'You will destroy what belongs to each private person'." One of her lovers "smelt like a goat". When asked her who she was visiting she said "To dwell with Aegeus, great Pandion's son."
In the Divine Comedy, a character called Thaïs is one of just a few women whom Dante Alighieri sees on his journey through Hell (Inferno, XVIII,133-136). She is located in the circle of the flatterers, plunged in a trench of excrement, having been consigned there, we are told by Virgil, for having uttered to her lover that she was "marvellously" fond of him. Dante's Thaïs may or may not be intended to represent the historical courtesan, but the words ascribed to her derive from Cicero's quotations from Terence.
Thaïs appears as Alexander's mistress in John Dryden's poem Alexander's Feast, or the Power of Music (1697), which begins with a description of Alexander enthroned with "the lovely Thais by his side" who sat "like a blooming eastern bride". The poem's account of the feast ends by comparing Thaïs to Helen of Troy: "Thaïs led the way/To light him to his prey/And like another Helen, fired another Troy." The poem was later set to music as an oratorio, also called Alexander's Feast, by George Frederick Handel. Robert Herrick (1591-1674) in "What Kind of Mistress He Would Have" concludes, "Let her Lucrece all day be, Thaïs in the night to me, Be she such as neither will, Famish me, nor overfill."
Thaïs is a supporting character in two novels by Mary Renault about Alexander the Great: Fire from Heaven and The Persian Boy, as well as in Renault's biography of Alexander, "The Nature of Alexander."
Other literary figures named Thaïs are references to Thaïs of Alexandria, a Christian saint of a later period.
- TD Ogden, in P. McKechnie & P. Guillaume, Ptolemy II Philadelphus and his World, 353 at 355
- Eugene N. Borza, “Cleitarchus and Diodorus' Account of Alexander, ” PACA 11 (1968): 35 n. 47
- Walter M. Ellis, Ptolemy of Egypt, Routledge, London, 1994, p. 15.
- Athenaeus: The Deipnosophists, Book 13, 576e.
- A transcript of Cleitarchus's account of the burning of Persepolis
- A commentary on the burning of the palace at Persepolis including excerpts from Diodorus and Plutarch
- biography by Christopher Bennett
- Chisholm, Hugh, ed. (1911). "Thaïs". Encyclopædia Britannica (11th ed.). Cambridge University Press.