Theaetetus of Cyrene (/ˌθiːɪˈtiːtəs/; Greek: Θεαίτητος) was a Greek poet who flourished in the 3rd century BC. He is mentioned in an epigram by Callimachus, a fellow native of Cyrene. In Epigram 7 (Pfeiffer), Callimachus writes, ἦλθε Θεαίτητος καθαρὴν ὁδόν. εἰ δ᾽ ἐπὶ κισσὸν τὸν τεὸν οὐχ αὕτη, Βάκχε, κέλευθος ἄλει, ἄλλων μὲν κήρυκες ἐπὶ βραχὺν οὔνομα καιρὸν φθέγξονται, κείνου δ᾽ Ἑλλὰς ἀεὶ σοφίην. Theaetetus travelled a splendid path. If that path, Bacchus, leads not to thine ivy wreath - other men's names the heralds will voice a little while, but his skill Hellas will voice for ever.