I think Nemesis is Roman, but probably a copy of a Greek statue. I might have chosen to forget because the "restoration" work on her head breaks my heart - but I know that's a common problem. Such a pity because the drapery is gorgeous.

Looking at this Diana/Artemis, who was much luckier than most statues by having her original head reattached, you can see how different it is. The proportions make much more sense.

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Photo of a marble statue of Artemis (aka Diana), which lives at the Louvre. Artemis is mid-step reaching for an arrow in the quiver on her back. In her other hand she's pulling on the antlers of a small deer that she has caught. She's wearing a short and practical belted tunic (chiton) appropriate for hunting, functional sandals, and an equally pragmatic hairstyle with her wavy locks in an up-do. Her arms and legs are neither skinny nor super muscly, they're very average looking. But, being a goddess, she's got a tiara. Not an ostentatious tiara, a simple solid tiara. A utility tiara, if you will. And being a female goddess, you can still see her nips pushing on the intricate drapery of her chiton. She's clearly got some sex appeal carved in, but the statue is of a capable person who is independently getting shit done.

I love her because she basically looks like the kind of woman a modern conservative commentator would condemn for subverting gender roles. Also with a proportional head.

Diane de Versailles - Louvre catalogue