Forgive me if this is a question answered here before, but I couldn't find the information elsewhere, and if anyone knows anything about ES, it would surely be you nice people, so here goes:

Who built the Cavern of the Incarnate?

I ask this because I was working on my dungeon mod yesterday, and in the CS I came across the static for the arched doorway to the cavern, and I thought: Who built that place anyway? It occurred to me that it is the Ashlanders who (primarily) embrace the Prophecies of the Incarnate (it is them you must prove yourself to after all), and it is unlikely to me that they ever had the capability to carve out stone, so I'm doubtful that it was them.

So who, then?

We don't know who built it. Considering it was the resting place for Moon-and-Star, I'd say it's younger then the rise of the Tribunal, but anyone could have built the thing.

Maybe the cavern was already a sacred site to Azura, so he was honored there. For reference DR, it's not Nerevar's tomb; his body was taken by the Tribunal, and he served them as a bonelord.

*smacks Hoon Ding* The ring dummy, I said it was the resting place for the damn ring. If I meant Nerevar I would have said Nerevar. Last time I checked Moon-and-Star was the name of the ring.

Right, Moon-and-Star the ring. That ring was sort of a big deal, how could I forget.

Bonelord!? I don't remember that! He must have been one cranky undead. I always thought the Tribunal had a very cruel streak, but this takes the cake.

A skeletal Undead isn't bound together by the same soul that the body once held.

This means: the Bonelord of 'Nerevar' didn't really house nerevar. just used his body. He was/is (depending on the size of Vvardenfell's explosion) the same as any other bonelord.

He http://www.imperial-library.info/sites/default/files/mwbks_consolations_saint_nerevar.jpg like one.

It's Daedric architecture, presumably. Although possibly built by the pre-Tribunal Velothi (think the strongholds).

It's just a cave, with Azura holding a lotus ring.