citadel van Diest,17 July 2021 Vlaanderen onroerend erfgoed 19de-eeuwse verdedigingsgordel Diest, accessed 17 July 2021 Wikimedia Commons has media related to...
Nieuwsblad. 16 January 2010. Retrieved 31 March 2021. "Dequevy glipt door verdedigingsgordel" (in Dutch). Het Nieuwsblad. 28 January 2010. Retrieved 31 March 2021...