Kerkyon was the King of Eleusis, and a very strong man. Kerkyon stood on the roads around Eleusis and challenged passers-by to a wrestling match. The loser (always the passer-by) was murdered, though Kerkyon promised his kingdom to anyone who won. He was eventually beaten and killed by Theseus, who took over the kingdom of Eleusis. Theseus won owing to his skill, rather than superiority in brute physical strength.