Adelaide of Poland

Adelaide of Poland (Polish: Adelajda Kazimierzówna) (c. late 1170s / early 1180s – 8 December 1211), was a Polish princess and member of the Piast dynasty.

She was the daughter of Casimir II the Just, Duke of Sandomierz and High Duke of Poland, and his wife Helena of Znojmo, a Přemyslid princess.

On the basis of the inscription of her tombstone at the Dominican Church and Convent of St. James in Sandomierz and two different reports by Jan Długosz, most modern historians agree about the facts covering Adelaide's life. There exists a dominant view in historiography about her filiation and death date. According to these historians, Adelaide was indeed the daughter of Casimir II the Just and died in 1211. She was the founder of the Convent of St. James. During the 19th century, there appeared a theory which suggested that Adelaide was the daughter of Casimir I of Kuyavia, who had entered the Convent of St. James as a nun and died there in 1291. This view, which had been accepted by several scholars, is now disputed. More recent historiography recognized her as the daughter of Casimir II the Just, and she was the founder of the Convent of St. James. She was buried at the convent after her death in 1211.