
Kasteel Ommerstein is a protected historic estate in Rotem, Dilsen-Stokkem, Limburg, Belgium, with medieval origins dating back to the 14th-15th centuries. The castle evolved through several family marriages and name changes before becoming Ommerstein by the mid-17th century. Its most distinctive architectural feature is a corner tower from the late 17th or early 18th century, while the current rectangular neoclassical structure was renovated in the mid-19th century with mansard roofs and regularly spaced stone-trimmed windows. The estate encompasses service buildings and a beautifully landscaped park laid out in the second half of the 19th century, featuring specimen trees and remnants of the original protective moat. Designated as protected architectural heritage since 2002.