But is it really art? After a gang was jailed for the theft of a golden toilet from Blenheim Palace, critics are still debating what makes an artwork valuable.
The stolen masterpiece worth £4.8m

Glossary
heist - Theft or, more accurately, armed robbery
Conceptual Art - Art for which the idea (or concept) behind the work is more important than the finished art object.
Winston Churchill - The British prime minister during World War Two, and later from 1951 to 1955.
Guggenheim Museum - The Solomon R. Guggenheim Museum is an art museum at 1071 Fifth Avenue between 88th and 89th Streets on the Upper East Side of Manhattan in New York City.
Delusions of Grandeur - A person's belief that they are someone other than who they are, such as a supernatural figure or a celebrity.
Marcel Duchamp - French artist (1887 - 1968) whose works challenged artistic norms. His piece L.H.O.O.Q. (1919) involved drawing a moustache and beard on a picture of the Mona Lisa.