A prerogative court is a court through which the discretionary powers, privileges, and legal immunities reserved to the sovereign were exercised. In England in the 17th century, a clash developed between these courts, representing the crown's authority, and common law courts. Prerogative courts included the Court of the Exchequer, the Court of Chancery, and the Court of the Star Chamber. Their procedures were flexible and not limited by common law procedures. The Star Chamber became a tool of Charles I employed against his enemies, and was abolished by parliament. A parallel system of common law courts was grounded in Magna Carta and property rights; the main common law courts were the Court of the King's Bench and the Court of Common Pleas.