Elis was the capital city of the ancient polis (city-state) of Elis, in ancient Greece. It was situated in the northwest of the Peloponnese, to the west of Arcadia. Just before the Peneius emerges from the hills into the plain, the valley of the river is contracted on the south by a projecting hill of a peaked form, and nearly 500 feet (150 m) in height. This hill was the acropolis of Elis, and commanded as well the narrow valley of the Peneius as the open plain beyond. The ancient city lay at the foot of the hill, and extended across the river, as Strabo says that the Peneius flowed through the city; but since no remains are now found on the right or northern bank, it is probable that all the public buildings were on the left bank of the river, more especially as Pausanias does not make any allusion to the river in his description of the city.