CORINTH, (the isthmus of), in the Morea, is a neck of land which joins the Morea to Greece, and reaches from the gulph of Lepanto to that of Egina. Julius Cæsar, Caligula, and Nero, attempted to cut a channel through it, but in vain; and they therefore afterwards built a wall across it, which they called Hexamilium, because it was six miles in length. This was demolished by Amurat II. and afterwards rebuilt by the Venetians, but was levelled a second time by Mahomet II.