The Minotaur is not just a monster in a maze. He is the sign of a royal failure that spreads from Crete to Athens.
The familiar version begins when Minos, king of Crete, refuses to sacrifice the beautiful bull sent by Poseidon. The punishment falls inside the royal house: Pasiphae gives birth to the Minotaur, a bull-headed figure whom Minos hides in the Labyrinth built by Daedalus.
Athens must send young people to Crete as tribute. Theseus joins them, enters the maze, kills the Minotaur, and escapes because Ariadne gives him a way to trace his path back. That is why the story is remembered as a tale of monsters and heroes, but also of debt, secrecy, help, and return.