I've written a short piece of fan-fic set in the Ninth World, and that means it's set in the universe of the RPG, Numenera. It's actually posted on Doctor Felbrigg's Mechanicorium web site.

I found the concept of a priesthood built around the study of objects from another age fascinating.  Not really a religious as such but rather scientists dressed up in religion, it reminded of Asimov's Foundation series.