The Volkshalle, also called Große Halle or Ruhmeshalle, was a proposal for a monumental, domed building to be built in a reconstituted Berlin in Nazi Germany. The project was conceived by Adolf Hitler and designed by his architect Albert Speer. No part of the building was ever constructed.

Welthauptstadt Germania or World Capital Germania was the projected renewal of the German capital Berlin during the Nazi period, part of Adolf Hitler's vision for the future of Nazi Germany after the planned victory in World War II. It was to be the capital of his planned "Greater Germanic Reich". Albert Speer, the "first architect of the Third Reich", produced many of the plans for the rebuilt city in his capacity as overseer of the project, only a small portion of which was realised between the years 1938 and 1943.