Well, there actually is glass that would be perfectly safe (at least as much as a standard house anyway). The idea that glass is fragile comes a lot from it being made in very wide, very thin sheets.
Try to go against a security, 10mm glass. Short of explosives or a battering ram, don’t expect to get inside anytime soon (and in the case of the ram, that’s going to take some effort).
By the way, I’m surprised nobody’s found €59000 quite steep for a mere 36m².
