This is the first actual depiction of the Calamity we've seen, I think.

[Chiaki stares at the mural with great interest, looking over every inch of it as if she's trying to memorize it.]

So far this is pretty consistent with Palitutu's reports. The script is in Latin, but I only know the words that show up in games a lot. We'd need a Scholar in here to translate the whole thing, probably.