The epinikion or epinicion (plural epinikia or epinicia, Greek ἐπινίκιον, from epi-, "on," + nikê, "victory") is a genre of occasional poetry also known in English as a victory ode. In ancient Greece, the epinikion most often took the form of a choral lyric, commissioned for and performed at the celebration of an athletic victory in the Panhellenic Games and sometimes in honor of a victory in war. Major poets in the genre are Simonides, Bacchylides, and Pindar.
Since the poets most often call their victory songs hymnoi (ὕύμνοι), it has been conjectured that hymns for Herakles, honored as the founder of the Olympic Games, were the original model for the athletic epinikion. Victory odes are also associated with the Dioscuri; Pindar uses the term "Castor-song" (Καστόρειον), and Polydeuces (Pollux), the mortal twin of Castor, was a boxer.
Although the best-known epinikia appear to have been composed for a chorus, they may have originally been performed by a soloist. Pindar says that a lyric by Archilochus was sung at Olympia, and a scholiast to the passage gives a quotation. The performance of these songs seems to have led in the 6th century BC to aristocratic commissions for more elaborate numbers.