Hekate is a goddess of the crossroads, the queen of witches, the ruler of the heavens and the underworld. She is the embodiment of darkness; the moon in it’s true color. She is the maiden, the mother, and the crone; the keeper of all vast knowledge.
Hecate (as far as I can tell) with the wheel of the year below. <-- this is either Artemis or Diana (note the bow and arrows, the crescent moon on her head) and the wheel is one of her chariot's wheels.