Roundheads were the supporters of the Parliament of England during the English Civil War (1642–1651). Also known as Parliamentarians, they fought against King Charles I of England and his supporters, known as the Cavaliers or Royalists, who claimed rule by absolute monarchy and the principle of the divine right of kings.[1] The goal of the Roundheads was to give to Parliament the supreme control over executive administration of the country/kingdom.[2]