Kasteel de Renesse, also known as Kasteel Oostmalle, stands in Oostmalle, Belgium, with origins traceable to 1431–1464 when Willem van Berchem constructed the initial fortress. Following its destruction by Maarten van Rossum in 1542, Jan van Renesse rebuilt the castle and adjacent structures, hosting notable visitors including Emperor Charles V and Margaret of Parma. After occupation during both World Wars and partial destruction from a 1941 British bombardment, the castle was acquired by the municipality after the 1977 Oostmalle-Westmalle union. The 60-hectare estate features a 16th-century castle, scenic pond, historic ice cellar, and restaurant Het Koetshuis. Cultural access is available free every Sunday from 1 to 6 PM, with guided tours at 3 PM.