Beyond the Church I arrived at the chamber of the sleeping princess, who wasn't so much sleeping and more long dead. Poking her destroyed the illusion that is the Ringed City (much like I heard that if you poke Gwynevere you reveal the true "dark" Anor Londo in the first Dark Souls) and left me standing in a massive desert of ash and ruin. Apart from one of the Princess' Knights who I put down, the only other one here is Gael... having grown to a massive size by cannibalizing the "people" here. He then turns to me with murderous intent.
The boss fight against Gael is certainly one of the "prettiest" in the series, with the physics defying knight flying in unexpected angles as he attacks. I only attempt two practice runs to read his basic set before summoning sunbro DogHow and S***A to assist. They are clearly experts at the fight and we have no problems as Gael switches to his even more beautiful phase 2 and phase 3 sequences, ultimately slaying the old slave knight with no friendly casualties. Thanks guys!
A picture cannot capture how awesome this fight is.
This just leaves one mysterious boss fog I found in an earlier secret passage which I couldn't enter. At first I thought it to be a bug, but it turns out there was a pre-requisite to open it first... defeat the dragon on the bridge.