According to reports in the major media, Iwan Wirth is regarded as the most powerful man in the art world.

He was the judge at the Hauser and Wirth pumpkin festival at Halloween. He chose Wayne Spilsbury, King's Head of Art, as the most innovative pumpkin carver for his 'Peep Show', a pumpkin with a secret. By putting 10 cents in the slot and looking through the peep-hole you discovered a haggard, ghastly witch within. See link for article on Iwan and Manuela Wirth in The Independent.