In the last several years 3D printing has been used to make sure that important things from history are safe. Many museums have bought 3D printers and are making pieces to fix their relics. The Metropolitan Museum of Art and the British Museum have started using their 3D printers to make replicas to sell in the gift shop. The National Museum of Military History and Varna Historical Museum sell digital versions of their items online, which everyone can 3D print at home.