The first mention of the castle of Aggersborg is found in the manuscript of the XII century. The castle was built on an impregnable rock in the 40 to from Graz. Its present form, the castle became in the seventeenth century and is now in private possession of the princes of Liechtenstein.

It is the largest castle Styria: length of walls is 3 km away, 11 bastions and seven gates. Note the luxurious decoration White and Knights ' halls. In the basement of the castle houses a Museum of witches.