Unknown Artist. Alexander Mosaic. Greco-Roman. Pompeii ITALY. circa 100 BC. Copy of either Apelles of Kos or Philoxenos of Eretria (both 4th century BC)
circa 100 BC
Greco-Roman copy from Pompeii (near present-day Pompei (Province of Napoli. Campania Region)) ITALY of either Apelles of Kos or Philoxenos of Eretria, both 4th century BC.
Here is a contemporary reconstruction of what some think the original looked like: