The Duke of Silesia was the title of sons and descendants of the Polish Duke Bolesław III Wrymouth. In accordance with the last will and testament of Bolesław, upon his death, his lands were divided i
The Duchy of Silesia with its capital at Wrocław was a medieval provincial duchy of Poland located in the region of Silesia.
Duke of Silesia
…The Duchy of Silesia, one of the hereditary provinces of Poland, Silesia, was granted to Bolesław III's eldest son, Władysław II the Exile, and was subsequently divided…
Fragmentation of Poland in 1138: Duchy of Silesia under Władysław II