Old and new often enter into a fascinating symbiosis in Cologne. Dunkl starts his tour at Cologne Cathedral, of course, and is taken to lofty heights by the cathedral's master builder. In The Kolumba by Peter Zumthor, he experiences the extraordinary atmosphere of an art museum. Cologne's largest urban expansion area "Rheinauhafen" and the master plan for the entire city by the Albert Speer office provide plenty to talk about.