In his 1999 book "The Triumph of the Moon", Bristol University history professor Ronald Hutton researched the Wiccan claim that ancient pagan customs have survived into modern times after being Christianised in medieval times as folk practices. Hutton found that most of the folk customs which are claimed to have pagan roots (such as the Maypole dance) actually date from the Middle Ages. He concluded that the idea that medieval revels were pagan in origin is a legacy of the Protestant Reformation.