Disclaimer: Please do not focus on the political aspect of this structure and its relations to a certain era of German history
The Volkshalle ("People's Hall"), was a huge domed monumental building planned by Adolf Hitler and his architect Albert Speer for Germania in Berlin. The project was never realized. If built, it would have been a symbol of Nazi Germany and would be Germany’s tallest building to this day.
Trivia
Architect:Albert Speer
Intended Completion Date: 1950
Height: 951 ft/290 m
Capacity:180,000 spectators.
Source(s) Wikipedia, SkyscraperPage