Aerial imaging of Dutch castles. Due to the increase in the quality and availability of LiDAR images and aerial photography, it is possible to investigate archaeological traces of Dutch medieval castles in detail. These aerial images show that most castle sites are much larger than previously thought. An interdisciplinary approach can help researchers to understand these sites, as the casus for castles with a system of multiple moats and embankments in the Oversticht shows. These were seen by the bishop and his allies – the cities of Zwolle, Deventer and Kampen – as military-functional architecture. Such observations change the conceptualization of castles in the Low Countries. Results like this example can be presented to a larger audience by working more closely with the entertainment industry.