Immenburg, Former villa estate in Endenich, Bonn, Germany

The Immenburg was a castle-like estate built in 1879 in the Historicist style for Major Ferdinand Flinsch, set within a large park in Bonn-Endenich. The building was largely destroyed in the Second World War and later demolished; only parts of the park remain, with a stone plaque at the corner of An der Immenburg and Auf dem Hügel bearing the estate's name.

The Immenburg was built in 1879 in the Historicist style by Major Ferdinand Flinsch, as a castle-like estate set in a large park in Bonn-Endenich. In 1912 the physicist Alfred Bucherer became its owner. The building was largely destroyed in the Second World War and then demolished; only parts of the park remain.

The name lives on in Immenburgstraße, An der Immenburg and a bus stop; a stone plaque at the corner of An der Immenburg and Auf dem Hügel bears the estate's name. The Laufhaus on Immenburgstraße is colloquially called Immenburg.

The site lies in Bonn-Endenich, where the streets "An der Immenburg" and "Immenburgstraße" and a bus stop keep the name alive; university institutes now occupy the grounds. A stone plaque with the estate's name is set at the corner of An der Immenburg and Auf dem Hügel. Only remnants of the park survive, so there is no castle to tour.

The Immenburg name survives in the streets Immenburgstraße and An der Immenburg, in a bus stop, and on a stone plaque at the corner of An der Immenburg and Auf dem Hügel. Locals also use "Immenburg" for the brothel on Immenburgstraße.