Category:Casimir I, Duke of Masovia

**Casimir of Masovia**
	(1320-1355)
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Date of birth	1320s
Date of death	26 November 1355
Place of burial	Płock Cathedral;
Position held	duke;
Family	Piast dynasty;
Father	Trojden I, Duke of Masovia;
Mother	Maria of Galicia;
Sibling	Eufemia of Masovia; Siemowit III, Duke of Masovia; Bolesław Jerzy of Mazovia;
Authority file
	Q2941051;
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