Rullingen Castle (also called Rolengen, Rolenghem and Ruelingen) is located in the valley of the Herk in Rullingen, a hamlet of the Belgian town of Borgloon.
The oldest known lord of Rullingen was Eggebertus van Rolengen, who witnessed the foundation of Averbode Abbey by his liege lord, Arnold II van Loon.
The medieval fortress was replaced, perhaps between 1623 and 1638, by a typical Maasland moated castle. It consisted of a U-shaped courtyard and an L-shaped mansion with a projecting square corner tower. In the 18th and 19th centuries, the castle was adapted to the then current housing standards; a coach house was added. Between 1770 and 1850 an English garden was laid out to the south.
In 1912 knight Pangaert d'Opdorp bought the castle. The farm behind the castle and a service wing disappeared in a fire in 1920. The building was thoroughly renovated, a garden was laid out and the canals were partially filled in. A new coach house was built with the demolition material.
The Limburg provincial government has owned the building since 1978. Until 2013, the building was operated as a hotel-restaurant. In 2014, the castle was sold by the Province of Limburg to the NV Livaco in Sint-Lambrechts-Woluwe, one of the companies of the project developer Kolmont of the Tans family in Hasselt.