Historical Background
The earthen rampart and the moat in front of it were built in the 13th century to defend the town. Until the 17th century there were walls, towers, and other fortifications here. The ancient structure took on its present appearance in the first half of the 19th century. Today it is 340 meters (1,115 feet) long along its crest and almost 400 meters (1,310 feet) at its base, and it rises up to 18 meters (59 feet) above the moat.






