The eponymous Neuendorf Monastery was first mentioned in documents in 1232 and was a monastery of the Cistercian nuns. In the 14th century, the monastery was one of the largest landowners in the Altmark. In 1578, the monastery was converted into a Protestant women's foundation. By this time, the properties were already under Brandenburg administration. Of extraordinary art-historical importance are the eight church windows in the choir with medieval glass paintings, which date back to 1330-1360.