Key Facts
- Duration
- 1138 – 1742
- Capital
- Wrocław (Breslau)
- Founding dynasty
- Piast dynasty
- Bohemian suzerainty established
- 1327–1335
- Treaty ending Polish claims
- Treaty of Trentschin, 1335
Imperial Zenith Metrics
Historical Trajectory
Phase I: Rise
The Duchy of Silesia was created in 1138 when the Polish duke Bolesław III Wrymouth divided his realm among his sons, assigning Silesia as a hereditary province under the Piast dynasty. Almost immediately the duchy began to fragment as successive generations of Piast princes subdivided their holdings, producing a mosaic of smaller Silesian duchies each ruled by a branch of the dynasty.
Phase II: Zenith
During the high medieval period, the Silesian Piast courts patronised German colonisation and urban development, with Wrocław growing into a significant trading centre on the Oder River. The region's fertile lowlands and silver-mining districts made it economically prosperous, and its dukes maintained cultural ties to both the Polish and the broader Central European sphere.
Phase III: Decline
From 1327 onward, most Silesian duchies accepted the suzerainty of the Bohemian Crown, and Poland's King Casimir III formally renounced his dynastic claims in the 1335 Treaty of Trentschin. Silesia subsequently passed through Bohemian, Habsburg, and finally Prussian hands; Frederick the Great's conquest in the War of the Austrian Succession (1740–1742) ended Habsburg rule and absorbed the region into Prussia.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory