Dieter Oesterlen was German architect. He re-built the Leineschloss, the Marktkirche, and the opera house all in Hanover after the destruction of World War II. Oesterlen's father was the chief engineer of a turbine factory in Heidenheim. His family left the town for Berlin during World War I. From Berlin they moved again to Hanover after his father was appointed professor of turbine technology at the localtechnical college. The foundations to Oesterlen's training in architecture began here. He regularly visited exhibitions at the kestnergesellschaft. He attended evening classes in freehand drawing at the School of Applied Arts. As a young man he worked in some unorthodox places. For instance, after completing high school he worked, as part of his practical requirements, at the construction site of the Oder-Dam as a carpenter. He was a great observer and absorbed much by merely going from place to place. Before he began a formal training as an architect he was already a “student” of architecture. The strict objectivity of the Bauhausbuilding in Dessau, which Oesterlen visited in the years before he started his architectural degree, made a lasting impression on him.
Education
In 1930 Oesterlen enrolled at the University of Stuttgart, where he trained under Paul Schmitthenner. The latter's conservative architectural philosophy, which later went on to be known as the Stuttgart School, was as far removed from the Bauhaus ideals as it could be. This did create a dilemma for Oesterlen. But he was also drawn to Schmitthenner's philosophy of looking at a building's design and detail as a homogeneous whole.
Early career
After graduating from the University Oesterlen worked for a year at Hugo Keuerleber in Stuttgart. Then he enrolled at the TH Berlin-Charlottenburg. There he initially with Heinrich Tessenowstraße, but changed a semester later to learning from Poelzig, who was at that time regarded as the best teacher of architecture in the Weimar Republic.
