Siemomysł or Ziemomysł (died ) was the third duke of Polans of the

Piast The House of Piast was the first historical ruling dynasty of Poland. The first documented Polish monarch was Duke Mieszko I (c. 930–992). The Piasts' royal rule in Poland ended in 1370 with the death of king Casimir III the Great. Branch ...

dynasty, and the father of

Poland Poland, officially the Republic of Poland, , is a country in Central Europe. Poland is divided into Voivodeships of Poland, sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 mill ...

's first Christian ruler,

Mieszko I Mieszko I (; – 25 May 992) was the first ruler of Poland and the founder of the first independent Polish state, the Duchy of Poland. His reign stretched from 960 to his death and he was a member of the Piast dynasty, a son of Siemomysł and a ...

. He was listed by Gallus Anonymous in his '' Gesta principum Polonorum'' and was the son of Lestek, the second known Duke of the Polans. According to Gallus' account and historical research, Siemomysł has been credited with leaving the lands of the Polans,

Goplans The Goplans or Goplanes ( la, Glopeani, pl, Goplanie) was an early West Slavic tribe that inhabited the central parts of the Kujawy region, with their probable seat at Kruszwica. They might have been named after the Lake Gopło; Kmietowicz believ ...

and

Masovians Masovians, also spelled as Mazovians, and historically known as Masurians, is an ethnographic group of Polish people that originate from the region of Masovia, located mostly within borders of the Masovian Voivodeship, Poland. They speak the Mas ...

to his son

, who further expanded them during his reign. According to modern Polish historian

Henryk Łowmiański Henryk Łowmiański (August 22, 1898 near Ukmergė - September 4, 1984 in Poznań) was a Polish historian and academic who was an authority on the early history of the Slavic and Baltic people. A researcher of the ancient history of Poland, Lith ...

, Siemomysł aided the Ukrani uprising against the Germans in 954 AD. He supposedly reigned from around 930 (although some historians believe that he reigned from around 950). Siemomysł united the lands of Polanie, Goplanie, and Mazowszanie (however, some historians think that perhaps his father did it first). His burial place is unknown. Siemomysł's wife (or wives) is unknown. There is a theory that the daughter of Włodzisław, prince of the Lędzianie tribe, could have been Siemomysł's wife, but there is no historical evidence to support this. Formerly it was thought that his wife was named Gorka, but

Oswald Balzer Oswald Marian Balzer (23 January 1858 in Chodorów – 11 January 1933 in Lwów) was a Polish historian of law and statehood, one of the most renowned Polish historians of his times. In 1887 he became a professor at the University of Lwów. B ...

refuted this view in 1895.

and Czcibor were his sons.

References

{{DEFAULTSORT:Siemomysl 10th-century Polish monarchs Piast dynasty Slavic pagans 10th-century deaths Year of birth uncertain Year of death uncertain

See also

References