In Greek mythology, the Minotaur is a monster of Crete with the body of a man and the head of a bull. The name minotaur is derived from the Greek words "Minos bull". It lived in a labyrinth, a large maze-like construction built for King Minos of Crete especially to house the bull. The Minotaur was the offspring of Pasiphaë, wife of King Minos, and a snow-white bull sent by Poseidon and intended for sacrifice. When Minos kept it instead, the god punished him by making his wife fall in love with the bull. The Minotaur was imprisoned in the Labyrinth built by Daedalus. After defeating Athens in a war, Minos forced the Athenians to send human tribute to be devoured by the Minotaur. When tributes were sent during the third year, Theseus volunteered to go, and with the help of Ariadne he killed the monster.