Duchy of Silesia

Duchy of Silesia Księstwo śląskie (Polish) Herzogtum Schlesien (German) Slezské knížectví (Czech)
1138–1335
Banner of arms Coat of arms
Territorial development of the Duchy of Silesia in the period 1185–1201: Fragmentation begins with Opole (green) and Racibórz (yellow) splitting off
Status	Province of Poland
Capital	Wrocław
Religion	Roman Catholic
Government	Feudal monarchy
Historical era	High Middle Ages
• Established	1138
• Duke Władysław II    exiled	1146
• Racibórz split off	1172
• Opole split off	1172
• Głogów split off	1177
• Głogów reintegrated	c. 1185
• Battle of Legnica	1241
• Lubusz split off	1241
• Lubusz reintegrated	1242
• Legnica split off	1248
• Nysa split off	1290
• Incorporated by    Bohemia	1335
• Land of the    Bohemian Crown	1348
Preceded by Succeeded by Duchy of Poland Duchies of Silesia (Bohemian Crown) ∟Duchy of Racibórz ∟Duchy of Opole ∟Duchy of Legnica ∟Duchy of Brzeg Roman Catholic Archdiocese of Wrocław
Today part of	Poland Czech Republic Germany

The Duchy of Silesia (Polish: Księstwo śląskie, German: Herzogtum Schlesien, Czech: Slezské knížectví) with its capital at Wrocław was a medieval provincial duchy of Poland located in the region of Silesia. Soon after it was formed under the Piast dynasty in 1138, it fragmented into various Silesian duchies. In 1327, the remaining Duchy of Wrocław as well as most other duchies ruled by the Silesian Piasts passed under the suzerainty of the Kingdom of Bohemia as the Duchies of Silesia. The acquisition was completed when King Casimir III the Great of Poland renounced his rights to Silesia in the 1335 Treaty of Trentschin.