Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Centennial Hall in Wrocław' has mentioned 'Prussia' in the following places:
Occurrence Sentence Text Source
It was in the Silesian capital of Breslau where, on 10 March 1813, King Frederick William III of Prussia called upon the Prussian people his proclamation An Mein Volk ("To My People") to rise up against Napoleon's occupation.