Cleisthenes (/ˈklaɪsθɪniːz/ KLYSSE-thin-eez; Ancient Greek: Κλεισθένης) was the tyrant of Sicyon from c. 600–560 BC, who aided in the First Sacred War against Kirrha that destroyed that city in 595 BC.
After his victory he abolished all the rhapsodes of Homer, because they praised the citizens of Argos.
[1] The key innovation of his reign, which Herodotus mentions, was the reformation of the tribal system in the city of Sicyon.
[2] Cleisthenes of Sicyon organized a competition whose prize would be marriage to his beautiful daughter Agariste.
Because Hippocleides made a fool of himself by dancing drunkenly in front of Cleisthenes, Megacles was chosen to marry Agariste.