Kronenburg (Crown Castle) is the medieval main building of Bentheim Castle, which was rebuilt in neo-Gothic style between 1883 and 1914.

After war damage in the 18th century, the castle had become uninhabitable and was used as a prison from 1817 to 1865. In 1883, Prince Alexis II Zu Bentheim und Steinfurt commissioned the building to be rebuilt and the residential wing to be converted into a modern aristocratic residence. In 1914, at the start of the First World War, the renovation was stopped.

Kronenburg nowadays offers ornate state rooms, which are furnished in the 19th-century style.