Because of its strategic position, Luxembourg was, from the 16th century until 1867, when its walls were dismantled, one of Europe`s greatest fortified sites. It was repeatedly reinforced as it passed from one great European power to another: the Holy Roman Emperors, the House of Burgundy, the Habsburgs, the French and Spanish kings, and finally the Prussians. Until their partial demolition, the fortifications were a fine example of military architecture spanning several centuries.