Pelagos has the same name as the ancient settlement that once existed there. The settlement was very close to ancient Mantineia and the temple of Poseidon ippiou, as reported by Pausanias. From there the road passed going from ancient Mantineia to ancient Tegea. Near Pelagos during the ancient battle of Mantineia, General Epaminondas was killed. Recently, a funerary monument has been found that is believed to belong to the General.