Henry II the Pious
Henry II the Pious (1196–1241), son of Henry I the Bearded and Saint Hedwig, married Anne, daughter of King Ottokar I of Bohemia, in 1218. He ruled during his father's 1229 captivity, became co-ruler in 1234, and in 1238 succeeded to Silesia, Kraków and the high-ducal title.
On 9 April 1241, at the Battle of Legnica, he led a Silesian and Greater Polish coalition against the Mongol invaders and was defeated and killed. His death undid his father's project of Piast reunification.