Seleukid Kingdom. Seleukos I Nikator Æ (23mm, 11,79 g.). Seleukeia on the Tigris mint, late 280s BC. Winged head of Medusa to right. Rev. Bull butting to right; BAΣIΛEΩΣ star and Θ above, monogram between back legs, [ΣEΛ]EYKOY in exergue. SC 151.2a; HGC 9, 76. Very Fine. Seleukos I was a Macedonian Greek general, officer and successor of Alexander the Great who went on to found the eponymous Seleucid Empire, led by the Seleucid dynasty. Initially a secondary player in the power struggles following Alexander's death, Seleucus rose to become the total ruler of Asia Minor, Syria, Mesopotamia, and the Iranian plateau, assuming the title of basileus (emperor). The Seleucid Empire was one of the major powers of the Hellenistic world, until it was overcome by the Roman Republic and Parthian Empire in the late second and early first centuries BC.