"There’s a fine view of the Danube from a room in the Ludwig Museum, a room covered with pink posters illustrating a hammer and sickle design where the hammer looks suspiciously like a toilet brush. A piece of paper is taped to the window, bearing the clunky legend, ‘My friend dildo says to you take posters, ride on Boris Popovič and take photo and send us please!’ Below, a suction cap adheres a large rubber phallus firmly to the pane. Ride with Self-Photographing (2014) is an installation by the Sarajevo-born Marko Brecelj, who clearly has a bone to pick with Mr Popovič, the current mayor of Koper in Slovenia. In this group show of malcontents and provocateurs, such Frank Zappaesque irreverence is the predominant tone."