Orb pieces

[bugmenot]

I'm nearly distressed. All your tipps helped me to find out, that I missed one torture room in the choir
the torture rooms in the choir I know is the one with the brass bull and the wheel. where and what is the third room ?
i walked miles in the choir. apperantly (for me) examined each centimeter. and i hated each step in this darkness alone with the roaring beast
i lost relative quick the orientation