Swedish artist Karl Holmqvist began the processual, site-specific artworkExistential Staircase / Existenzielles Treppenhaus of the Fridericianum inthe building's stairway. Written in black marker up and down the stairwellare the Five Ws: "WER!!?," "WANN!!?," "WAS!!?," "WO!!?," and"WARUM!!?" or "WHO!!?," "WHEN!!?," "WHAT!!?," "WHERE!!?," and"WHY!!?" The questions, written in capital letters and arranged individuallyor in groups, dominate the side and front walls of the staircase as well asthe landings.