She reluctantly married Bolesław V ("the Chaste") and became princess when her husband ascended the throne as High Duke of Poland.

The marriage was largely arranged by, and the vow of chastity patterned after that of Bolesław's sister, Salomea of Poland.

She soon did not want any part in governing the kingdom which was left to her, and decided to become a Poor Clare nun in the monastery at Sandec (Stary Sącz).

She would spend the rest of her life in contemplative prayer and did not allow anyone to refer to her past role as Grand Duchess of Poland.

On this spot the miners erected a statue of Saint Kinga, carved entirely from salt, which is 101 meters under the Earth's surface.