Background
He was the third and youngest son of Trojden I of Czersk and Maria, daughter of Yuri I, King of Halych-Volhynia.
- Photos
- Works
src="/web/img/loading.gif" data-src="/web/show-photo.jpg?id=2471658&cache=false" alt="Other photo of Casimir Casimir of Masovia" class="gallery__img" height="167"
Other photo of Casimir Casimir of Masovia
- Photos
- Works
Casimir Casimir of Masovia
Edit ProfileCareer
The formal division of the paternal inheritance took place in 1349, when Casimir I received the small district of Warsaw, being the first time that this district became in the capital of a Piast Dukedom. On 18 September 1351, Casimir I and Siemowit II decided to paid homage to the Polish King Casimir III the Great. In return of their submission, the Masovian Dukes received the promise that if the King died without sons, the entire inheritance of Bolesław III passed to them.
In fact, they received the main district of Bolesław III, Płock immediately, but in exchange of a payment of 2,000 fines.
Casimir I died between 26 November and 5 December 1355 and was buried at Płock Cathedral.
