The Green Vault contains the largest treasure collection in Europe. The museum was founded in 1723 by Augustus the Strong of Poland and Saxony, and it features a variety of exhibits in styles from Baroque to Classicism. The Green Vault is named after the formerly malachite green painted column bases and capitals of the initial rooms. It has some claim to be the oldest museum in the world; it is older than the British Museum. In 1547, Holy Roman elector Moritz of Saxony ordered the construction an additional wing to Dresden Castle. Four of the added rooms on the first floor of the palace were given elaborate, molded plaster ceilings. In these rooms, the column bases and capitals were painted a bluish-green color. Due to this coloring, the rooms were referred to as the “Green Vault.” The official name of these rooms, which were protected against fire and robbery by thick walls and iron shutters and doors, was “Privy Repository”.