Anavryta was originally based on the educational principles of Kurt Hahn, and modelled on Hahn’s own creations the Schule Schloss Salem and Gordonstoun.
In 1920, part of the castle premises were acquired for use as a boarding school, which continues to this day as the Schule Schloss Salem.
Currently the grounds are home to the middle school campus of the boarding school Schule Schloss Salem, founded in 1920 by Kurt Hahn and Prince Max of Baden.
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It includes such institutions as Phillips Academy in Andover, USA, Schule Schloss in Salem, Germany and the Institute for Educational Development at the Aga Khan University.
In 1968 the family returned to Germany, and after a short time in a boarding school (Schule Schloss Salem), von Prondzynski attended the Thomas-Morus Gymnasium in Oelde, passing his Abitur examination in 1972.