Casimir II, also known as Casimir the Just, was a Polish prince who ruled as the Duke of Sandomierz from 1177 until his death in 1194. He was a member of the Piast dynasty and is remembered for his efforts to strengthen the Polish state during a time of fragmentation. His reign was marked by attempts to consolidate power and improve the administration of his territories. Casimir II was known for his just and fair governance, which earned him respect among his subjects. He played a significant role in the political landscape of Poland during the late 12th century, navigating conflicts with rival factions and promoting peace. His legacy includes contributions to the development of the Polish state and its legal system.