Theseus and the Minotaur. To find out more about the half-man half-bull Minotaur, see this Wikipedia article: link; for information about the image: image source.
Here you see the hero Theseus slaying the half-man half-bull Minotaur. You might want to look at some other "myths and legends" blog posts about The Birth of the Minotaur, The Labyrinth (where the Minotaur lived), and this quite different depiction of Theseus and the Minotaur in a neo-classical painting.
You can also find more myths and legends for the week of August 12-18 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.