A was the plan. B was built to test some crucial aspects of the plan. What am I talking about?

A



B



 
(A)Welthauptstadt ("World Capital") Germania was the name Adolf Hitler gave to the projected renewal of the German capital Berlin, part of his vision for the future of Germany after the planned victory in World War II.

Doubts persisted at the time as to whether the marshy Berlin ground could have taken the load of the proposed projects, leading to the construction of an exploration building Schwerbelastungskörper (B), literal translation: Heavy load-bearing body, which still exists. It is basically an extremely heavy block of concrete used by the architects to test how much weight the ground was able to carry. Instruments monitored how far the block sank into the ground. The Schwerbelastungskörper sank 18 cm in the three years it was to be used for testing, a maximum depth of 6 cm was allowed. Using the evidence gathered by these gargantuan devices, it is unlikely the soil could have supported such structures without further preparation