These two types of art are grouped together as it is often hard to distinguish between Hellenistic art and Roman copies of Hellenistic or Greek art.

If a sculpture was produced within the Roman Empire but shows little or no influence from Hellenistic examples (e.g., the Colossus of Constantine), or shows Hellenistic influence but is not a direct copy of a Greek or Hellenistic era antecedent (e.g., Prima Porta Augustus), it should be in one of the subcategories of Category:Roman Empire sculptures.