Duchy of Cieszyn
Overview
 
The Duchy of Cieszyn or Duchy of Teschen or Duchy of Těšín was an autonomous Silesian duchy
Duchies of Silesia
The Duchies of Silesia resulted from divisions of the original Duchy of Silesia after 1138.In accordance with the last will and testament of Duke Bolesław III Wrymouth, the Kingdom of Poland was, upon his death in 1138, divided into five hereditary provinces distributed among his sons, including...

 centered on Teschen
Cieszyn
Cieszyn is a border-town and the seat of Cieszyn County, Silesian Voivodeship, southern Poland. It has 36,109 inhabitants . Cieszyn lies on the Olza River, a tributary of the Oder river, opposite Český Těšín....

 (Cieszyn) in Upper Silesia
Upper Silesia
Upper Silesia is the southeastern part of the historical and geographical region of Silesia. Since the 9th century, Upper Silesia has been part of Greater Moravia, the Duchy of Bohemia, the Piast Kingdom of Poland, again of the Lands of the Bohemian Crown and the Holy Roman Empire, as well as of...

. After the feudal division of Poland it was split off in 1281 and ruled by Silesia
Silesia
Silesia is a historical region of Central Europe located mostly in Poland, with smaller parts also in the Czech Republic, and Germany.Silesia is rich in mineral and natural resources, and includes several important industrial areas. Silesia's largest city and historical capital is Wrocław...

n dukes from the Piast dynasty
Piast dynasty
The Piast dynasty was the first historical ruling dynasty of Poland. It began with the semi-legendary Piast Kołodziej . The first historical ruler was Duke Mieszko I . The Piasts' royal rule in Poland ended in 1370 with the death of king Casimir the Great...

 since 1290. The Duchy of Teschen was also composed of smaller Duchies at various points of time, such as Oświęcim
Duchy of Oswiecim
The Duchy of Oświęcim , or the Duchy of Auschwitz , was one of many Duchies of Silesia, formed in the aftermath of the fragmentation of Poland....

 which was split off around 1315, or Zator
Duchy of Zator
The Duchy of Zator was one of many Duchies of Silesia.It was split off the Duchy of Oświęcim, when after eleven years of joint rule the sons of Duke Casimir I in 1445 finally divided the lands among themselves, whereby his eldest son Wenceslaus received the territory around the town of Zator...

 which in turn split from the Duchy of Oświęcim in 1454.
The duchy shared the history of Cieszyn Silesia
Cieszyn Silesia
Cieszyn Silesia or Těšín Silesia or Teschen Silesia is a historical region in south-eastern Silesia, centered around the towns of Cieszyn and Český Těšín and bisected by the Olza River. Since 1920 it has been divided between Poland and Czechoslovakia, and later the Czech Republic...

, and also in part Silesia in general.
 
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