The museum also organized the first major museum retrospectives of the work of Allen Ruppersberg (1985), John Baldessari (1990), Ad Reinhardt (1991), Jeff Wall (1997), Barbara Kruger (1999), and Takashi Murakami (2007). In addition there were also monographic shows like an ambitious installation by Robert Gober in 1997, or a revelatory survey of Sigmar Polke's photographic work in 1995.