The satrapy of Armenia became a kingdom in 321 BC during the reign of the Orontid dynasty after the conquest of Persia by Alexander the Great, which was then incorporated as one of the Hellenistic kingdoms of the Seleucid Empire. Under the Seleucid Empire (312–63 BC), the Armenian throne was divided in two — Armenia Maior (Greater Armenia) and Sophene — both of which passed to members of the Artaxiad dynasty in 189 BC.