First off, I'd like to reference and ask questions about the lore I plan to use in a fan-fiction/mod:

• Ayleid language - Does "Mor Malatu" translate to "Dark Truth"?
  
• Ayleid worship - Did the Ayleids really worship Magnus? And what was he renown for?
  
• Ayleid architecture - Why are pretty much all Ayleid ruins underground? And why are a majority of them part tomb or catacomb like?
  
• Magnus - Did he create schematics and diagrams for the design of Mundus? If so, could it be safe to assume he didn't create those on regular parachment? Does Magnus ever communicate with Mundus or the inhibatants of Mundus? Such as the Ayleids or Galerion.
  
• Ceporah Tower - Any idea who created it? Were documents stored here before the arrival of the Aldmer?
  
• Ayleid migration - Did the Ayleids migrate from Summerset Isle? Or are they really descendants of the Aldmer?
  
• St. Alessia's Rebellion - Would it be safe to assume that the Ayleids knew or had suspicions of Alessia's rebellion?

Any answer or theory would be appreciated! Discussion about these topics would also be appreciated too, I'm just asking the questions as a follow-up for discussion. I know this thread might belong better in another thread.

1. Yes.
2. Yes. God of light! God of magic!
3. We don't know, but in my opinion it's because the Ayleids built the above ground portions of their structures out of something that didn't last long after they left. I'd go with fractal silk cocoons, myself. The only thing left after decay were the marble bits, which seem to largely have been used as tombs.
4. Yes. No, he made them out of myth and magic. Not that we know of - unless you count Mehrunes Dagon.
5. Nobody knows.
6. Unclear, but I think it is likely that they descended from the Aldmer.
7. I have no idea.

This book should answer a couple of your questions at least: http://uesp.net/wiki/Lore:Glories_and_Laments.

Magnus is the reason why magic exists. He created the sun, a hole in Mundus which leads to Aetherius.


The stuff not under ground was razed, I guess.


Magnus did created the plans of Mundus and since the material world didn't exist back then, there was no regular parachment. You have to think more abstract.


Wasn't that the Sload? I could mix something up here.


They came from Summerset I think, and they remained even vassals of the kings of Summerset, officially. Yet not practically.


It was Ayleid civil war back then. Some Ayleid city states even helped her.
Before the rebellion broke out, I guess nobody cared for the slaves because of the war.

The Eye of Magnus could be his plans for Mundus, I suppose.