Men and women in the work of Egon Schiele are often naked, exceedingly gaunt, and emotionally flayed, as if an insulating layer had been stripped away and their nerves laid bare. Such raw skin and existential skinniness reads like the touchstone for an exhibition that looks at depictions of skin—as an envelope of the self, a social barrier, a decorative surface, a facade—in Viennese art of the fin de siècle. —L.J.