The ancient labyrinth is a metaphor of our current reality.
The Cretan Bull was a bull that appeared in the myth of the Labors of Heracles, as well as the myth of the Minotaur, in Greek mythology. It was the creature that Pasiphae fell in love with, and became impregnated by, eventually giving birth to the Minotaur. This creature was said to be half man and half bull, which lived at the center of a confusing underground maze.
The bull was said to demand sacrifices in human. flesh. I believe this famous myth is based off the constellation Taurus and it's story flow is almost the exact opposite of what was originally intended.