Using Wikimedia Commons gallery pages for extra images to put in the museum is a great solution.
Have you considered generating rooms in the museum based on Wikipedia outlines or indexes? Perhaps a special room with card-catalogue looking shelves or something? Although, being basically special kinds of lists, the outlines and the indexes aren't very visually appealing...
Wikipedia also has portals, but most of them are half-dead and unmaintained, so I don't recommend using them.
P.S. Linux version works well for me.
P.P.S. It would be great if the version of the game was shown somewhere in the menu.