Several paintings have been stolen in an overnight break-in at a Dutch museum, including a Picasso, a Matisse, and two Monets, the BBC reports. The Kunsthal Museum has no permanent collection, and is currently showing works by more than 150 famous artists as part of the Triton Foundation's 20th anniversary celebrations—the first time the foundation's entire collection had been on display. The museum is closed today, and police are reviewing security video and looking for witnesses. (More art heist stories.)