…Dietrich Bonhoeffer, like his brothers and sisters, grew up to be a citizen of Berlin, despite the Swabian, Thuringian, and Silesian influences. His eventful life cannot be considered apart from this background. All the other places that were important to him in the course of his life–Breslau, Tubingen, New York, London, or Finkenwalde–certainly influenced him. The decisive influence, however, was Berlin and its complex diversity… 

Eberhard BethgeDietrich Bonhoeffer: A Biography (Revised Edition); Chapter 1: Childhood and Youth: 1906-1923, 23.