This is gonna be Mt. Targon related. Possibly the only remaining people who have properly recorded history of the lunari prior to their being wiped out? Constellation has reappeared due to Diana's attempt to resurrect lunair ways?
EDIT: Haha, look at all these upvotes I'm getting. Man, I wish I wasn't because rereading it a second time, I realize I misread the wording on the final page and I no longer think its Mt. Targon afterall. I'm gonna go with what a few other people have said and lean towards Ionia.