Zero windows is a hallmark of a data center. The other hallmarks are huge backup generators, diesel fuel tanks, and massive cooling systems. In an urban setting, fuel and generators are hidden underground, inside the building, or adjoining buildings. The AC is probably on the roof.
Yeah, that’s my conclusion as well. Lack of windows means no electronic interrogation, monitoring, interference and maybe (?) designed to withstand some sort of EMP attack? (dunno)
I assume those massive openings can be buttoned-up inside somehow - just a guess, of course
What is that building called? I can’t remember but I saw pics of it years and years ago