6 photos and cards that came in a group together.
Reverse of one of the postcards read: 'Deutschlands schonste Thingstätte Heiliger Berg bei Heidelberg'.
I'm looking for more info if anyone can add ...thanks.

Here's bits & pieces I found on german wikpedia (translated)-

Heidelberger Thingstätte is one of about 40 Thing places the early days of National Socialism and was built from 1934-35.

Geographically it is the counterpart to the Heidelberger Ehrenfriedhof, of about the same time (1934) on the ants bump, a the holy mountain on the other side of the Neckar opposite ridge, was applied to fallen soldiers of World War Heidelberg.

In the 56 rows of seats, which rise 25 meters diagonally, 20,000 people found space at the opening. The semicircle of the ceremony site (the term Thingstätte had at that time already separated) was opened by Propaganda Minister Joseph Goebbels on 22 June 1935th On this occasion were the only time during the Hitler era, the courts fully occupied.

The Thingstätte said to have been built on an alleged Germanic cult place, which it was issued as part of the Nazi blood-and-soil mystique. The stage should be used mainly for propaganda events. In the following years, there were some ideas about Thing games such as "The Way into the kingdom," or "The Oratory of the work." But soon the Nazis lost the interest in the plant, since the broadcasting represented a more effective tool for disseminating propaganda.

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