Historic Silesia, superimposed on modern international borders: The mediƦval Bohemian crown land ( as of 1538 ) outlined in cyan, Prussian Silesia as of 1815 in yellow
Historic Silesia, superimposed on modern international borders of Poland, Germany and Czech Republic: The mediƦval Bohemian crown land ( as of 1538 ) outlined in turquoise, Prussian Silesia from 1742 in yellow
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