Örup Castle was completed around the year 1500. Together with Glimmingehus, Bollerup and Tosterup, the castles were built as defenses in an uncertain and dangerous time, when the Swedes and Danes fought over power and lords believed they must protect their own soil against both external enemies.
Örup was first mentioned in 1437 when it was owned by Danish family Qvitzow. Later it has been a residence of Flemming and Ulfstrand families. Between 1558-1913 Örup was owned by Rosencrantz family. Today it is the property of family Swartz.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.