Beisbroek Castle, Protected castle in Sint-Andries, Belgium

Beisbroek is a castle set within a 98-hectare estate featuring pastures, deciduous woodland, and walking paths throughout the grounds. The property borders the Tudor Municipal Domain and offers a mix of built and natural spaces for visitors to explore.

Edouard de Nieulant built the castle in 1835 and laid out the surrounding park. It passed to his son-in-law Adolphe Otto de Mentock, who also succeeded him as mayor of Sint-Andries, and later to heirs of the Otto de Mentock and de Busschere families. The city bought the 98-hectare estate in 1973 and opened it as a public domain with a nature centre in 1976.

The castle houses a nature center offering educational programs about local ecology and environmental conservation to school groups and individual visitors. People come here to learn about the plants and wildlife found in the surrounding woodland area.

The nature centre, planetarium and public observatory occupy the 19th-century castle; the surrounding 98-hectare estate is a public city domain opened in 1976. The building stands in Sint-Andries, south of central Bruges, near the Diksmuidse Heirbaan and the motorway. A fenced heath of about 2 hectares on the southern edge is grazed by sheep.

The grounds are home to Cozmix, a public observatory where visitors can use telescopes to observe stars and celestial objects. This facility makes the estate a meeting point between science and nature.