On 21 March 1986, Gerard Jan van Bladeren cut the painting Who's Afraid of Red, Yellow and Blue III (1967) by Barnett Newman with a utility knife during a psychotic episode. He was sentenced to eight months in jail and two years probation, and was banned from the museum for three years. On 21 November 1997, Van Bladeren, the same vandal, cut the painting Cathedra (1951), also by Barnett Newman.