Just when I thought I know every inch of the temple, after playing the game for about 6 years now, after having tried every Co8 mod there's this parchment I found(the one by the throne, in the ground level of the temple) for the very first time! How cool to find something I didn't notice before, or is it a 5.5.0 addition? Really nice touch!
Added in 5.0 days, by Lord Spike I believe (with some technical help). Based on something in the original module.