1. The former St. Gudula Convent was built between 1923 and 1925 for the Steyler Missionary Sisters in a simple neo-Baroque style. The building is plastered and features a central projection and porch. It is located on the former castle courtyard from the early 13th century, which the Lords of Rethe built on this side of the stream. (Hence the street name "Burgplatz" (Burg Square) near the City Museum near the church).
2. A simple two-story house, also called "Burg," was built on this site as early as 1844. Miss Gertrud Sieverding bequeathed it to the St. Gudula Parish after her death in 1920. The parish, in turn, donated the property to the Steyler Missionary Order in 1922, which added a large, three-wing, horseshoe-shaped monastery and chapel adjacent to the 1844 house. (This is the most architecturally valuable part of the complex and is therefore a listed building.) It was consecrated on August 5, 1925, and used by the sisters as a retreat house and convalescent home. During World War II, the convent housed a military hospital, and after the war, a home economics school was established. Under the guidance of the sisters, young women learned the basics of home economics. In the early 1960s, a boarding school and a school building were built on the convent grounds. Since 1983, the Klausenhof Academy from Dingden has owned the building under a leasehold. Not all of the nuns left Rhede in 1983. The small group that remained moved into the Arnold Janssen Convent, a villa on the Südesch River. (Source for 2: Book "Greetings from Rhede" by Christian Böing-Messing and Bernfried Knipping)
PS: I've included a postcard from the book of the Rhede "castle" = house from 1844 in the photo gallery.