The historical figure of Johann Georg Faust was a 16th Century German occultist. The legendary Faust was a character written about in plays in stories since that time. This fictional Faust sold his soul to Satan for dark powers. His wickedness is contrasted with that of the lady Margareta, a woman of humility and holiness, whom Faust covets. Faust is encouraged down his dark path by the demon Mephistopheles.
This inspired a now-unknown 18th Century sculptor to carve a single log of sycamore wood into a sculpture that, when viewed from one side shows Mephistopheles and, from the other, shows Margareta. It is on display at the Salar Jung Museum in Hyderabad, India. You can see more photos of this remarkable piece at My Modern Met.
Photo: Salar Jung Museum