Trolleholm Castle (Trolleholms slott) was originally named Kattesnabbe and later Ericholm. It has been known since 1424, and was a monastic estate in the late Middle Ages. Trolleholm belonged to members of the Thott family (1533-1680) and Trolle family (1680-1806). Frederik Trolle (1693-1770) gave it its present name in 1755. The castle was reconstructed in the 1760s according the design of Carl Hårleman. The present appearance date from the late 19th century, when Trolleholm was renewed in the early Renaissance style.
During 1806 was the estate by inheritance to the family, who still owns it. The holder of the estate carry the family name Trolle-Bonde. The estate comprises 110 houses and a total of 62,800 acres (254 km2). There is a very valuable library including 40,000 books. The great garden is open to the public.
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.