It has finally come to it! I am really stuck. In the main hallway of the tomb of rites you have a light puzzle. I solved it and it opened 2 smaller rooms (left and right of the main hallway). I got the one with the chest, easy peasy, but the other one has a single laying down sarcophagus.
I have been trying to put things on it for a long time, is there a secret there I am missing or is it simply decoration to throw me off?