Hidden door in Mauseleum

[withalligators]

Immediately when you enter the mauseleum head right and interact with the wall at the end of the hallway, just before the end of it. A hidden door opens and lets you into a room with a coffin that I can't open. Any ideas?

[KZA]

I'm pretty sure the hidden door is on the left once you've entered the Mausoleum - you can open that coffin if you have the quest with the black amulets. Else it doesn't do anything :)