The Kallmorgen Tower, a radically modern classic by one of Hamburg's most important post-war architects. For months, Hamburg residents have been observing the changes to the striking highrise on Willy-Brandt-Strasse: the Kallmorgen Tower. With its strictly symmetrical architecture and prominent location on the so-called Spiegel Island, the seventeen-story office building is a symbol of forward mobility, the will to change, and assertiveness. The Hamburg architect Werner Kallmorgen was a mastermind, 'in 1968, his building seemed almost futuristic; today, it is a classic' (Theja Geyer). The high-rise building, designed for IBM and based on a Hollerith punched card, was acquired by Quest Investment Partners in 2016, gutted, and now completely renovated. Ruediger Glatz accompanied the project continuously with his camera and portrayed its development. The result is a historical document of a previously neglected landmark of the city of Hamburg.