Waldenburg is a town in the district Zwickau in Saxony, Germany. The castle was owned by the House of Schönburg from 1378 until 1945. …Waldenburg is a town in the district Zwickau in Saxony, Germany. The castle was owned by the House of Schönburg from 1378 until 1945. The pottery town of Waldenburg lies in the valley of the Zwickauer Mulde. The environment is characterized by forest areas, river meadows and the hilly landscape of the Erzgebirge foothills.