Cru'dads thoughts with certainties:
Coin 1 is certainly a CONSTANTIUS II probably Cyzicus mint Turkey as follows:
Constantius II AE3. FL IVL CONSTANTIVS NOB C, laureate bust left, draped & cuirassed / PROVIDEN-TIAE CAESS, campgate, 6 to 9 layers, two turrets, star above, SMKA [A officina letter] in ex. RIC Vol VII page 647 No 26
Coin 2 is certainly a MAXIMINUS II probably Thessalonica mint Greece as follows:
Maximinus II AE Follis. AD 312. MAXIMINVS PF AVG, laureate head right / IOVI CONSERVATORI, Jupiter standing left, holding globe & leaning on sceptre, wreath in left field, A in right field, dot SM dot TS dot in ex. RIC Vol VI page 518 No 50a
Coin 3 is unclear but appears Countermarked and may be a very worn BC Republic Denarius of some sort – difficult to research and I do not hold the books.
Coin 4 is an Antoninianus but inscriptions insufficient to ID positively outside IMP

? AVG but looks like:
CLAUDIUS II GOTHICUS circa AD 268-270 with Reverse that is really unclear except perhaps a figure standing.