This coin has an unusual dot in the doorway.
Constantius II
A.D. 325- 326
18mm 2.8gm
FL IVL CONSTANTIVS NOB C; Laureate, draped and cuirassed bust left.
PROVIDEN-TIAE CAES •; camp gate with two turrets and star between them; • in doorway.
in ex. MNS
cf. RIC VII Nicomedia 128