Chances are, followers have heard of the Elgin Marbles.
The EM are not marbles, in the round spherical sense. They are marble statues and other marble antiquities that were looted from certain Greek temples at the start of the 17th century. The related dispute between Greece and Britain hits the international headlines with some regularity. The EM dispute is a complex international dispute, but MB has written a short play on the subject, to enlighted followers on the various intricacies, as is his wont: