Correction for the size of The Citadelle
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How big is 87,000 square feet?
It's about one-twentieth as big as The Citadelle

The size of The Citadelle is about 1,600,000 square feet.
(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 160,000 square feet in total area. The fortress sits on a 90-meter cliffside, overlooking the St. Lawrence River.