Orpheus and Eurydice. To find out more about Orpheus and Eurydice, see this Wikipedia article: link; for information about the image: image source.
This beautiful painting by Jean-Baptiste-Camille Corot shows Orpheus leading his bride, Eurydice, out of the Underworld, returning her from the land of the dead to the land of the living. He is forbidden to look back - but as the sad story goes, he could not resist taking a backward glance, and so he lost his Eurydice forever.
You can also find more myths and legends for the week of August 19-25 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.