During World War 2, Hitler rejected all but two forms of art; "Un-German degenerate art of the likes of Pablo Picasso and classical realistic art that represented all that was good about Nazi Germany and Germans." Art movements at the time such as Art Deco, and the Bauhaus were banned and shut down.
Instead, Hitler wanted "visible representations of Nazi ideals", and employed architects like Albert Speer to design government buildings that would create a sense of awe, as well as appearing intimidating to others.
The New Reich Chancellery in Berlin (office for German Chancellor) was designed by Speer with high columns and gigantic doors, with an eagle sculpture above the entrance in the Voss-strasse entrance, for "an awe-inspiring entrance to the seat of Nazi power."
Speer's designs typically incorporated symmetrical designs, round columns, sculptures arranged symmetrically, with the focus on line.
Another thing you might what to look at are the propaganda film's of Leni Riefenstahl. They don't deal with architecture as such, but it's another idealised representation on Nazi Germany which you might find useful!
http://en.wikipedia.org/wiki/Triumph_of_the_Will
http://en.wikipedia.org/wiki/Olympia_(1938_film)