Seebenstein Castle, just south of Vienna, was built between 1180 and 1230. At one time, it was owned by the Princes of Lichtenstein; today it is privately owned and lived in by a family that opens it to the public on weekends. Filled with antique furnishings, the stone castle has some beautiful stained glass windows as well as a collection of children’s armor.
References:The Citadelle of Quebec is an active military installation and official residence of both the Canadian monarch and the Governor General of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City. The citadel is the oldest military building in Canada, and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico.
The first fortifications in Quebec were built by the Governor General of New France Louis de Buade, and completed just in time for the Battle of Quebec in 1690.
After the British conquest in the second half of the 18th century, the problem of Quebec City's defences grew more acute.