Kloster St. Mariä und Gertrudis, Cistercian monastery in Hedersleben, Germany.

Kloster St. Mariä und Gertrudis is a Cistercian complex in Hedersleben featuring a square cloister, baroque agricultural buildings, and a medieval tower attached to Saint Gertrude's Church. The ensemble forms a cohesive layout where the structures flow together, displaying the characteristic arrangement of a Cistercian convent.

The complex was founded in 1253 by Albert and Ludwig von Hakeborn, with twelve nuns from Helfta Abbey relocating there in 1262. It maintained its Catholic identity while the surrounding region turned Protestant during the Reformation.

The name refers to Saint Gertrude, a medieval abbess whose veneration remained particularly strong within these walls. The spaces continue to serve the Catholic community today, reflecting the monastery's enduring spiritual role.

The monastery is located in Hedersleben, Saxony-Anhalt, and now houses an event center, Catholic parish office, and educational facility. Visitors can explore the grounds and see how the space functions for different activities and community purposes today.

The monastery was dissolved by a decree of the Kingdom of Westphalia on 16 September 1810; the last abbess, Maria Theodora Meinong, had died shortly before, and 16 nuns still formed the convent. In January 1811 the bankers Süssmann Heinemann and Israel Jacobson bought the estate with about 1780 Morgen of land and the monastery mill, selling it a month later to Johann-Matthias Heyne of Kloster Gröningen. The purchase contract stipulated that the church remain Catholic.