Lysippos' Seated Hermes is known from numerous versions in several scales and media. The best known example is the bronze from the Villa dei Papiri at Herculaneum, now in Naples. See, for example, nos. 961ff. in Siebert, "Hermes" in LIMC and p. 130ff. in Moreno, et al., Lisippo, L'Arte e la Fortuna.