The Flak Towers of Vienna are unique relics of the National Socialist dictatorship of the Second World War. The huge stone remnants of that time were largely destroyed by the Allies after the War. German cities like Hamburg and Berlin lost most of them through the process of denazification; only Vienna preserved all six of its towers. Among different revilatisation proposals for one of the Augarten towers, there exists the opportunity to use the space for a columbarium. Through this new use the Viennese population would be confronted directly with a part of Austrian history and become sensitized with this by means of a long overdue historical review. The architectural concept also encompasses an effective treatment of the topic „death in the city“. The inner-city space is becoming more and more expensive and is subject to a certain planning responsibility in terms of social and aesthetic usage. Creating an urn grove within the city, in particular as an alternative to the rather decentralized “Vienna Central Cemetery” would seem to be reasonable in this context.