Since its opening in the mid-90s, Berlin's contemporary art showcase – housed in an impressive old railway station – has been a veritable Aladdin's cave for fans of post-1950 artistic movements. From pop art, minimal art and Fluxus to conceptual art, the changing exhibits feature seminal works by renowned artists like Andy Warhol, Cy Twombly, Joseph Beuys, and Robert Rauschenberg.