Art dealer Larry Gagosian has topped a list of the art world's 100 most powerful figures.
Gagosian was described by Art Review as a 'mega-dealer'
The annual chart, compiled by the magazine Art Review, called Mr Gagosian "the world's greatest art businessman".
Sir Nicholas Serota, the director of the Tate galleries, remained in third place for the second year.
But art collector Charles Saatchi dropped 11 places down the list to number 17. He topped the chart in 2002 and was sixth in 2003.
ART POWER TOP TEN
Sir Nicholas Serota
Maurizio Cattelan (artist)
Sam Keller (fair director)
Dakis Joannou (collector)
Bill Ruprecht (auction house)
Ronald Lauder (collector)
Robert Storr (curator)
Takashi Murakami (artist)
The top 10 includes two artists, but is predominantly made up of gallery owners, collector and dealers.
Los Angeles-born Gagosian opened the largest private gallery in London earlier this year.
Art Review said: "Gagosian is a figure of mystery and controversy. That alone should tell us something about the art world and the place of mega-dealers in it.
"If artists today are defined less by their styles than by the prices they command, then no individual has done more to charge that market than the dealer called GoGo."
The director of the Museum of Modern Art in New York, Glenn Lowry, raced up the list to number two after being listed in 14th place last year.
But the highest climber in the top ten was artist Maurizio Cattelan at number four. He was up 20 places on 2003.
Contemporary artist Damien Hirst slipped to 78 from 49 last year. The contents of his Pharmacy restaurant recently sold at Sotheby's for more than £11m.
Indian-born British artist Anish Kapoor is a newcomer on the list, at 83, along with Scottish artist Jack Vettriano who rounded off the list in 100th position.
Other British newcomers include Amanda Sharp and Matthew Slotover, founders of
the Frieze Art Fair, at 32.
But Tracey Emin, who appeared on the inaugural list in 2002, was left out of the list again this year.