Dsonophorus

I'm going to go with: it was a cover for removing specific items.

Enigmatic_Continuum

That's exactly what I'm thinking, and probably some stuff was meant to be destroyed, too. It's also possible that real artifacts were removed a long time ago and frauds put in their place.

Conway

Building full of priceless works of art. Nah we don't need a gaseous fire suppression system or sprinklers.

WhyNoDonuts

-or functioning fire hydrants for first responders! Naw let's send them in dry.

mrnobu

The Royal Portugese Family lived on the premises at one point.

Mark_it_Zero

It was probably just some Olympic swimmers blowing off steam

anotherdream

lol nice