The Minotaur was a monster, half bull, half human, the
offspring of Minos' wife Pasiphae and a wonderfully beautiful
bull. ... When the Minotaur was born Minos did not kill him.
He had Daedalus, a great architect and inventor, construct a
place of confinement for him from which escape was impossible.
Daedalus built the Labyrinth, famous throughout the world.
Once inside, one would go endlessly along its twisting paths
without ever finding the exit.
[ Mythology, by Edith Hamilton ]