You got it! Macedonia, Thessalonica. Maximus Caesar AE28 AE 28, 12.52 gr. G IOULOUHR MAXIMOC KE, bare-headed, draped bust right / QECCALONIKEWN, Nike walking left, holding Kabeiros and palm branch. Mionnet Supp. III, 985; BMC 115 var.
Yeah Gordian III. AD 238-244. AR Antoninianus Rome mint, 4th officina. 8th-11th emissions, AD 240-243. IMP GORDIANVS PIVS FEL AVG, radiate, draped, and cuirassed bust right / VIRTVTI AVGVSTI,Hercules standing facing, head right, resting right hand on hip and placing left on club set on rock; lion skin beside club. RIC IV 95; RSC 404. 5.3g 23mm
Oh my. I had to stare at it for a full minute before I saw the portrait, or at least I think I now see a portrait. Front-facing?? At first I was focusing on the relief on at the top right, which looks like a nose in profile but is probably hair. Looks like a job for a specialist, so I'll just sit here and wait for someone else to guess .
Its hard to guess the ruler with absolutely no facial detail - that just entertains wild guessing. Justinian?