this is a sort of large den made exclusively for male guests to simply relax and be without female company. the few women that do come in are simply servants or entertainment.
this room is dedicated to all of the French royal family's collected pieces of artwork. As patrons of the arts, there are quite a lot of pieces of artwork in this large room.
This is one of the largest rooms in the palace. covered wall to wall with books, and comfy tables and chairs galore, how could you not relax in this room?
often the thinking place for the king of france, this private and somewhat hidden room's use has been extended to all king's that come to visit versailles.