The British Household Cavalry is made of two regiments: The Life Guards and The Blues and Royals. They are the senior regular regiments in the British Army, with traditions dating from 1660. The "Horse Guards", (as they are known, for short), have their barracks in Hyde Park Barracks in Knightsbridge in London and perform their principal duty of forming daily The Queen's Life Guard at a building in London which was formerly the headquarters of the British Army. There are always mounted guards on duty ouside the "Horse Guards" building in front of which lies the famous Horse Guards Parade where The Queen's Birthday Parade takes place. There, the daily ceremony of the "Changing of The Queen's Life Guard" takes place. (This is a different Changing of the Guard to the one at Buckingham Palace.) 