Gallienus and 2x Constantine II - If those are random rather than selected as the best, you should have fun with the lot.
Congrats, @Snorlax93. The Gallienus and campgates are already cool, in their present state. The little silver hammered is a 16th c. denar of Habsburg Hungary. --Concentrate on the Romans!
With that beard (-??), and the silver content on an antoninianus (thank you, radiate), I was gravitating more to Postumus.
Another silver it looks, any guesses? Looks like a soldier/emperor with a shield? Edit: think I found it on a site, noted as unlisted.
Your coin is a common bronze issue for Constantine I, though they can be silvered. similar to the example below (sold) though yours does not have the horseman on shield and may not be the same RIC number as I can't make out any important details like the mintmark and I am not completely sure of the obverse legend. Constantine I A.D. 318-19 18mm 3.0gm IMP CONSTAN-TINVS AVG -- high crested helmet, cuir., spear across r. shoulder, shield on left arm inscribed with horseman. VICTORIAE LAETAE PRINC PERP -- two Victories stg., facing one another, together holding shield inscribed VOT PR on altar. In ex. BSIS RIC VII Siscia 56