Hedwig of Silesia  Hedwig of Silesia (), also Hedwig of Andechs (, ; 1174 – 15 October 1243), a member of the Bavarian comital House of Andechs, was Duchess of Silesia from 1201 and of Greater Poland from 1231 as well as High Duchess consort of Poland from 1232 until 1238. She was reported in the two-volume historical atlas of Herman Kinder and another author to have been great in war and defended from the Teutonic Knights. She was canonized by the Catholic Church in 1267 by Pope Clement IV. The daughter of Count Berthold IV of Andechs and his second wife Agnes of Wettin, she was born at Andechs Castle in the Duchy of Bavaria. Her elder sister, Agnes married King Philip II of France (annulled in 1200) and her sister, Gertrude (killed in 1213) King Andrew II of Hungary, while the youngest Matilda, (Mechtild) became abbess at the Benedictine Abbey of Kitzingen in Franconia, where Hedwig also received her education. Hedwig's brother was Bishop , Count of Andechs-Meranien. Another brother was Berthold, Archbishop of Kalocsa und Patriarch of Aquileia. Through her sister Gertrude, she was the aunt of Elizabeth of Hungary. At the age of twelve, Hedwig married Henry I the Bearded, son and heir of the Piast duke Boleslaus the Tall of Silesia. As soon as Henry succeeded his father in 1201, he had to struggle with his Piast relatives, at first with his uncle Duke Mieszko IV Tanglefoot who immediately seized the Upper Silesian Duchy of Opole. In 1206 Henry and his cousin Duke Władysław III Spindleshanks of Greater Poland agreed to swap the Silesian Lubusz Land against the Kalisz region, which met with fierce protest by Władysław's III nephew Władysław Odonic. When Henry went to Gąsawa in 1227 to meet his Piast cousins, he narrowly saved his life, while High Duke Leszek I the White was killed by the men of the Pomerelian Duke Swietopelk II, instigated by Władysław Odonic. The next year Henry's ally Władysław III Spindleshanks succeeded Leszek I as High Duke; however as he was still contested by his nephew in Greater Poland, he made Henry his governor at Kraków, whereby the Silesian duke once again became entangled in the dispute over the Seniorate Province.