Some Paris data centers are disguised as apartment buildings with the classic Hausmannian facade, and then you open up Google maps and see a ton of AC units stacked on the roof. These aren’t likely major cloud data centers mind you, and the motivation for concealing them has more to do with the city’s aesthetic codes than military defense.

or less aesthetic versions https://en.wikipedia.org/wiki/33_Thomas_Street#/media/File:A...