The Imperial House of Gaia, also referred to as the Imperial Family, is the monarchy of the Imperial Union of Gaia and its overseas territories. The Gaian monarchy is one of the oldest continuous hereditary monarchy in the world. The monarch has ultimate executive authority over the government of Gaia and also serves as the commander in chief of the Gaian Defence Forces. Since the Imperial Union Act of 3265, the monarchy has gain an increasing voice in the two chambers of the Imperial Parliament.