in Ancient Geography, the chief city of the ancient kingdom of Pontus. It was built by the Milesians, and peopled partly by them and partly by a colony from Athens. Under the kings of Pontus it became a very flourishing city. Mithridates Eupator made a large addition to the town, which he called Eupatoria, and made it his residence alternately with Sinope. It was taken by the Roman general Lucullus in the Mithridatic war, and afterwards by Pharnaces son of Mithridates. Julius Caesar, after defeating Pharnaces, restored it to its ancient liberty. Amisus is now called Samsoon.