Here's a Constantine I campgate that has been turned into (probably) a game piece. It sold for a little over $154.08.
dealers description-
CONSTANTINE I THE GREAT
306-337 AD.
Bronze Follis; Antioch mint. AD 326-327.
2,03 g. 16 mm.
Obv: CONSTANTINVS AVG; laureate head right.
Rev: PROVIDENTIAE AVGG; camp gate with two turrets; • in doorway, A-Ԑ across fields, SMANT in exergue.
RIC 71.