 During the ensuing War of the Austrian Succession, Maria Theresa saved her crown and most of her territory but lost the mineral-rich Duchy of Silesia to Prussia and the Duchy of Parma to Spain.Emperor Charles VI has been the main motif of many collectors' coins and medals.One of the most recent samples is high value collectors' coin the Austrian Göttweig Abbey commemorative coin, minted on 11 October 2006.