The Ursuline Monastery of Quebec City was founded by a missionary group of Ursuline nuns in 1639. It is the oldest institution of learning for women in North America. Today, the monastery serves as the General Motherhouse of the Ursuline Sisters of the Canadian Union. The community there also operates an historical museum and continues to serve as a teaching centre.
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.