From Duchamp’s urinal ‘Fountain’ to Bowie trolling the art world with his own publishing house, and Insta-art that isn’t all that it seems

The art world means serious business. Paintings and sculptures sell for hundreds of millions of pounds at the drop of a gavel, works are stolen and sold on the black market, and the authenticity of others have divided elitist circles worldwide. Naturally, all this lays the groundwork for some good old fashioned trolling. From surrealists to web-savvy pranksters, art history is plagued with examples of tricks and jokes that at best, have provoked laughter, or worse, stirred international outrage. And yet, beyond their immediate effects on people’s nerves, the most controversial works of art often voice essential critiques to the art world and society.