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Casimir I of Kuyavia ( Polish: Kazimierz I kujawski) (c. 1211 [1] – 14 December 1267) was a Polish prince and a member of the House of Piast. He was Duke of Kujawy after 1233, ruler over Ląd from 1239-1261, ruler over Wyszogród after 1242, Duke of Sieradz from 1247-1261, Duke of Łęczyca after 1247, and Duke of Dobrzyń after 1248.
- Cathedral of Włocławek
- Agafia of Rus
Casimir I of Kuyavia was a Polish prince and a member of the House of Piast. He was Duke of Kujawy after 1233, ruler over Ląd from 1239-1261, ruler over Wyszogród after 1242, Duke of Sieradz from 1247-1261, Duke of Łęczyca after 1247, and Duke of Dobrzyń after 1248.
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Casimir received a force of 1,000 heavy footmen and a significant amount of gold to restore his power in Poland. Casimir also signed an alliance with Yaroslav I the Wise , the Prince of Kievan Rus' , who was linked with him through Casimir's marriage with Yaroslav's sister, Maria Dobroniega.
Casimir's son Duke Konrad I of Masovia in 1233 created the Duchy of Kuyavia for his second son Casimir I. When Casimir's elder brother Duke Bolesław I of Masovia died in 1248, he took the occasion and took Dobrzyń Land east of the Vistula River from the heritage of his younger brother Siemowit I.
Mar 13, 2024 · Casimir I of Kuyavian (in Polish Kazimierz I Kujawski), the dynasty Piasts, was born around 1211 and died on 14 December 1267. It is the second son of Conrad I of Mazovia and Agafia, the daughter of Prince Sviatoslav of Vladimir-Volhynia.
Casimir I the Restorer (Polish: Kazimierz I Odnowiciel; 25 July 1016 – 19 March 1058), a member of the Piast dynasty, was the duke of Poland from 1040 until his death. Casimir was the son of Mieszko II Lambert and Richeza of Lotharingia .
Casimir I of Kuyavia (Polish: Kazimierz I kujawski) (c. 1211 [1] – 14 December 1267), was a Polish prince member of the House of Piast, Duke of Kujawy since 1233, ruler over Ląd during 1239-1261, ruler over Wyszogród since 1242, Duke of Sieradz during 1247-1261, Duke of Łęczyca since 1247 and Duke of Dobrzyń since 1248.