It should be the French castle, Leto.
Are you sure nothing is in there? If there isn't, I think EA meant the castle to be spooky that way...
Ah, thanks. I've changed it. Nice that you correct me, too, now.
I've get help from a lot of sides now.
But no, there is nothing to get there. You can try it yourself, if one of your sims has the castle. Just look at the wall at the left site of the room where the bureau is. When you inspect the wall almost right behind it you will find it.