Heeze Castle used to be the centre of the seigneury of Heeze, Leende and Zesgehuchten, part of the Duchy of Brabant. In the Middle Ages, it was owned by the de Horne family. In the seventeenth Century Pieter Post designed a new castle, of which the first part was built in 1665. Pieter Post had died and the work was completed by his son Maurits Post.
Due to the rising costs of importing all building materials from other regions of the country, the build of the Post design was halted early and never finished. For this reason, the part of the castle that is used by the current owners was actually meant to be the servants' quarters. The biggest part of the castle was to be built behind the first courtyard.
In 1760 the castle was bought by Jan Maximiliaan van Tuyll van Serooskerken. The van Tuyll van Serooskerken family has lived in the castle ever since.
At the east of the building of Heeze Castle within the waters is a part of an older castle situated Eymerick Castle. This castle was already in 1659 in a bad shape. Because the building-plans of Heeze Castle were never completed this part of the old castle is still there.References:
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.