Silver coin of ancient Athens and modern Greek 1 Euro coin, 425-400 BCE
Classical Antiquity (~800 BCE - 500 AD)
Modern Antiques or Ethnography (~1800 AD or later)
(media.piefed.social)
Every country that is a member of the Eurozone mints their own coins with their own motifs. Only the paper notes are standardized.
To illustrate: these are all the (different) coins in my wallet:
(values from left to right: 1 Euro, 20 cent, 10 cent, 5 cent, 1 cent)
The only countries I can determine are Spain (twice), Germany (thrice), Greece (once) and the Netherlands (once). Mostly because Spain and the Netherlands wrote their country's name on their coins and Greece used Greek letters.