Is 53,000,000,000 square millimeters as big as The Citadelle?
It's about one-third as big as The Citadelle
The size of The Citadelle is about 150,000,000,000 square millimeters.
(a.k.a. La Citadelle, a.k.a. Québec Citadelle, a.k.a. The Citadel) (Québec City, Quebec, Canada) (for the fortified enclosure)
The Citadelle of Quebec, containing Canada's oldest military buildings measures about 15,000,000,000 square millimeters in total area. The fortress sits on a 90-meter cliffside, overlooking the St. Lawrence River.
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