Tirsbæk estate was first time mentioned in 1401. The current castle was built in 1550, while the tower and west wing were added in 1577. The park was finished in 1745, among other things with a vineyard - the oldest existing in Denmark. Since 1912, the place been owned by Algreen-Ussing family. They run Tirsbæk as a combined arm and forestry as well as rental of homes for private persons and companies. The former stable has been converted to an exclusive restaurant, Restaurant Slotsstalden. The castle is not open to the public, but a Christmas market is held every year, where it is possible to walk around the yard and a few of the former farm buildings.
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.