I saw that this morning too.

I pressed it..it looks like it should do something... :-/

it didn't do anything for me either, did you see to the left? There was a room with quoins.

Oh no that's what I went to look for and forgot all about it haha I bet that button opens the way in ..dam I want to play with my BUTLER...LOL There's too much going on tonight...for me..haha!!!