Dresden castle houses five museums, the Historic Green Vault and the New Green Vault, the Numismatic Cabinet, the Collection of Prints, Drawings and Photographs and the Dresden Armory with the Turkish Chamber.
Also accessible is an art library (Kunstbibliothek) with approximately 260,000 volumes of special literature on art history. The character of the holdings is closely related to the collecting focal points of the museums.
The Gallery of the Electors and the Hausmannsturm, once Dresden's largest tower, can be visited as well. -wiki