In 1229, the Counts of Mansfield started a convent for women. At first, it was on the grounds of their castle. Then they built a separate convent at Helfta near Eisleben, which opened in 1258. It was governed under either the Benedictine or Cistercian model. It became known for its powerful and mystical abbesses, including Gertrude of Hackeborn, Gertrude the Great and Mechtild. However, Duke Albrecht of Brunswick destroyed the convent in 1342. It was rebuilt the next year. It closed in 1524, but later reopened on a smaller scale until 1542