Assumburg Castle. Slot Assumburg is a castle in the east of Heemskerk in the province of North Holland in the Netherlands.
The current castle dates from 1450. However, the many finds of, and pottery from earlier times made it quite certain that the current castle had a predecessor.
In 2021 this was discovered by geophysical survey with Electromagnetic conductivity technique. Just north of the current castle, there was a round castle bailey of 12 m diameter, surrounded by a moat.
On it was a round brick tower of 9.5 m diameter. Historical records refer to a house with moat and a flattened hill.
Between 1399 and 1446 this hill was leveled and replaced by an orchard. It probably dates originally from the 13th century, but was renovated in 1546 and is named after the hamlet of Assum between Heemskerk and Uitgeest. It is assumed that demolition material from Oud Haerlem Castle was used in the construction, but that is not the case. The power that the castle radiates is also more apparent than reality. In fact it is an imitation of a medieval castle. The thin walls would not have withstood a siege. Such a castle is usually called a wings castle. Assumburg Castle has been a noble residence for many centuries. After 1867 the castle remained uninhabited. The paneling and utensils were transferred to Marquette Castle. The environment also lost its former glory: the park around the castle disappeared. From