Secret room in the Abbandoned castle

[YENKO]

I finally explored the Abbandoned castle, found the right painting and retrieved the chest for the King down under, in the cellar or whatever. Also found the skull for the poor skullless skeleton there. He was grateful, and started rambling about some secret chamber in the castle. I explored every inch of the castle, and found out that one of the wall torches is 'clickable', but I cannot click on it, nothing happens. The 'grab-hand' animation is there, but does nothing.
Is there really a secret room in the castle? (beside the room you enter after the wall painting sucks you in, that is).

Thanks.