There are too many coins posted in this topic, it will get confusing. The last one you posted is probably Claudius II, similar to the one below. Note that there are several different types and they will differ slightly.
this is for the coin directly above this post Constantius II A.D. 326-7 FL IVL CONSTANTIVS NOB C; Laureate, draped and cuirassed bust left. PROVIDEN-TIAE CAESS; camp gate with two turrets and star between them, dot in doorway. in ex. SMANTI RIC VII Antioch 74