An écorché with a raised left arm seen from the back; studies of the muscles of the right and left thighs, seen from the front. Red-chalk drawing, 17th century, after L. Cigoli.

Licence: Public Domain Mark

Credit: An écorché with a raised left arm seen from the back; studies of the muscles of the right and left thighs, seen from the front. Red-chalk drawing, 17th century, after L. Cigoli. Wellcome Collection. Source: Wellcome Collection.