Schwartzistan › Kesselhöh › Grauburg › Grauburg Fortress Grauburg Fortress Grauburg Fortress is a landmark in Kesselhöh, founded 1588. Grauburg Fortress is a landmark of the country. Contents Revision history. Read this entry as it stood at the end of 1825 · 1850 · 1875 · 1900 · 1925 · 1950 · 1975 · 2000 · 2025. CategoriesLandmarks in KesselhöhPlaces in GrauburgEstablished in 1588