[quote=@Webmaster]
<Snipped quote by Revolutionary>

I'm wondering if they used this as some kind of storage for significant cultural artifacts when they realized they would be overrun by Society V. There would be a lot more than this, though.
[/quote]

You think this was some kind of doomsday shelter kind of thing? People could even have lived further in, and the mechanisms from before would seem pretty effective at keeping things out.