Karl Schwarzschild Observatory
In 1969 the four East-German astronomical institutes, Astrophysical Observatory Potsdam, Babelsberg Observatory, the Thuringian Sonneberg Observatory, and Karl Schwarzschild Observatory Tautenburg, were joined in the course of academy reform to the Central Institute of Astrophysics of the Academy of Sciences of the GDR. The solar observatory Einstein Tower and Observatory for Solar Radio Astronomy were affiliated later.