Æ42 - Valerian and Gallienus ΕΠΙ ϹΤΡ ΒΑΛ ΑΡΙϹΤΟΜΑΧΟΥ ΟΜΟΝΟΙΑ ΜΥΤΙΛΗΝΑΙΩΝ ΠΕΡΓΑΜΗΝ ΕΦΕϹΙ

The ΟΜΟΝΟΙΑ ("homonoia") coinage of Mytilene records a formal friendship alliance between that city and both Pergamum and Ephesus simultaneously — an unusual triple acknowledgment struck under the strategia of Bal. Aristomachos. These alliance bronzes were civic prestige pieces, not trade currency, issued to mark concordat relationships between cities that competed fiercely for imperial favor during the joint reign of Valerian and Gallienus.

The sheer diameter of this issue places it among the largest provincial bronzes of the mid-third century, a deliberate statement of civic ambition from a city determined to assert its standing within the Pergamene conventus.