Minotaur

In Greek mythology, the Minotaur was a creature that was part man and part bull.  It dwelt at the center of the Labyrinth, which was an elaborate maze-like construction built for King Minos of Crete and designed by the architect Daedalus and his son Icarus who were ordered to build it to hold the Minotaur. The historical site of Knossos is usually identified as the site of the labyrinth. The Minotaur was eventually killed by Theseus.

Source:  http://en.wikipedia.org/wiki/Minotaur