This painting is probably a portrait of two important people of ancient Pompeii: A married couple from Pompeii. They are believed to be the lawyer Terentius Neo and his wife.
It shows how realistic some of the paintings of ancient Roman times were.
Terentius Neo and his wife, Pompeii travel, Italy Tourist Attractions
Artists of the Renaissance were inspired by paintings like these as they looked for ways to make their own paintings look more life-like.