The regalia were used together for the coronation of Scottish monarchs from Mary I in 1543 until Charles II in 1651. They were used to represent Royal Assent to legislation in the Estates of Parliament before England and Scotland were unified under one parliament in 1707, at which time the Honours were locked away in a chest and the English Crown Jewels were adopted by British monarchs. They were rediscovered in 1818 and have been on public display at Edinburgh Castle ever since. The Honours have been used at state occasions including the first official visit to Scotland as monarch by George IV in 1822 and the first such visit by Elizabeth II in 1953. The Scottish Parliament was founded in 1999 and the Honours are used there once again to represent Royal Assent.