There was one segment of architecture, where Hitler could have become quite successful, which boomed after the Great War: War memorials, since there, he wouldn't need to bother himself with questions of practicality, which, at least according to Albert Speer, was something, at which Hitler really sucked, both when it came to his ideas for the new Reich Chancellery in Berlin, which ended up having doors, guarded by guards of honour, leading to nowhere, and his Berghof residence above Berchtesgaden, where he was so fixated on the grand parlour having the most spectecular view of the Alps possible, that he completely neglected to include technical rooms like a pantry or a boiler room in his plans.