The picture depicts a <a href="https://en.wikipedia.org/wiki/Maenad" class="extiw" title="en:Maenad">maenad</a>, follower of the god <a href="https://en.wikipedia.org/wiki/Dionysos" class="extiw" title="en:Dionysos">Dionysos</a> (identified with the Roman god Bacchus) in the Greco-Roman mythology.
<bdi><a href="https://en.wikipedia.org/wiki/en:%C3%89lisabeth_Vig%C3%A9e_Le_Brun" class="extiw" title="w:en:Élisabeth Vigée Le Brun"><span title="18th- and 19th-century French painter (1755–1842)">Élisabeth Louise Vigée Le Brun</span></a>
</bdi>
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