Kasteel van Nieuwenhoven, 13th century château in Sint-Truiden, Belgium

Kasteel van Nieuwenhoven is a long brick château with grey stone trim courses and pale stone window surrounds, standing north of Sint-Truiden. Its left end carries a round brick tower under a tall, steeply pitched dark slate conical roof with a small finial. The two-storey facade has rows of rectangular windows, a steep dark roof with several small chimneys, and near the right end a triangular pediment above an arched window.

The castle began as a summer residence for abbots of Sint-Trudo Abbey and was fortified in 1329 for defensive purposes. By the 18th century it was transformed into a permanent residence for the abbots, leaving behind its earlier military role.

The name Nieuwenhoven, meaning "new courtyards", refers to the abbots' country residence and farmstead. After the French Revolution the estate was sold as church property and passed to noble families, including the de Moffarts, who kept it until 2007. Since then the castle has housed apartments and a public activity centre.

The castle stands north of Sint-Truiden, east of Nieuwerkerken village. Since 2007 it has been split into private dwellings and a publicly accessible activity centre, so only that centre is open to visitors. The surrounding woods form the Provinciaal Domein Nieuwenhoven, a 161-hectare recreational forest with a visitor centre and catering, bought by Limburg province in 1972.

The woods beside the castle, known as the Galgenbos, were nearly parcelled out for building plots in the early 1970s. The province of Limburg bought them in 1972 and turned them into the Provincial Domain Nieuwenhoven, a 161-hectare recreational forest with a visitor centre.