Not rare or anything, just a nice one. It was a good price and I couldn't resist. I didn't have one from the Trier mint and now I do! Post your Constantinopolis commemoratives! Constantine I, AD 307-337. Roman billon reduced centenionalis, 2.51 g, 17.1 mm, 6 h. Trier, AD 330-331. Obv:CONSTANTINOPOLIS, laureate, helmeted and mantled bust, left, holding scepter over shoulder. Rev: Victory standing left on prow, holding scepter and shield; TRP• in exergue. Refs: RIC vii, p. 215, 530; LRBC I 59; RCV 16444; Cohen 21.