St. Catherine's Church in Middelhagen, with boulder foundations, was built around 1455. The wooden tower was created only later – according to the strict rules of the Cistercian monks, many churches were built without towers. The Catherine's altar from the Middle Ages (c.1480) is still preserved – it was probably installed here only after the Thirty Years' War, having been brought from Stralsund to Middelhagen. Another very valuable piece is a chalice dating from 1597; it is made of gilded silver.
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.