A visitor views an installation at the Danish and the Nordic pavilion during the vernissage of the 53rd Biennale International Art Exhibition in Venice, June 3, 2009. (Photo by Tony Gentile/Reuters)

A sculptural artwork depicting a hooded high school student shooting former Chilean dictator Augusto Pinochet and headless presidents is seen at the Contemporary Art Museum in Santiago, December 2, 2014. The artwork, part of the “El ladrillo angular” (The angular brick) exhibition, portrays a student fighting against the ongoing continuity of dictatorship because of a political and economic system which has been impossible to destroy, according to “Papas Fritas” the artwork's creator. (Photo by Ivan Alvarado/Reuters)

A sculptural artwork depicting former Chilean dictator Augusto Pinochet and headless presidents shot by a hooded high school student (not pictured) is seen at the Contemporary Art Museum in Santiago, December 2, 2014. (Photo by Ivan Alvarado/Reuters)

An element of the installation “Voyageurs” by French artist Cedric Le Borgne sits atop building top at Place Bel Air in Geneva December 1, 2014. The installation is part of the Geneva Lux Festival presenting four art installations in the town city centre until January 11, 2015. (Photo by Denis Balibouse/Reuters)

“Cardinal Sin” a work by British artist Banksy is unveiled at the Walker Art Gallery in Liverpool, December 16, 2011. (Photo by Phil Noble/Reuters)

A work by Spanish artist Pamen Pereira is displayed during an exhibition in Burgos, Spain, May 29, 2009. (Photo by Felix Ordonez/Reuters)

A woman takes pictures of art installation “Alice” by Spanish artist Cristina Lucas in the Andalusian Centre of Contemporary Art in Seville, southern Spain, April 10, 2013. (Photo by Marcelo del Pozo/Reuters)

A woman approaches an artwork called “Big Chook”, made of fibreglass and high gloss epoxy marine paint, on Tamarama Beach in Sydney, November 2, 2005. (Photo by Will Burgess/Reuters)

A security guard jokingly inspects the back of a self-portrait entitled “Mask II” by Australian sculptor Ron Mueck at the Royal Scottish Academy in Edinburgh, July 31, 2006. (Photo by David Moir/Reuters)

A sculpture named “Awilda” is pictured at the shore of the Botafogo beach in Rio de Janeiro, September 3, 2012. (Photo by Pilar Olivares/Reuters)

An artwork of a taxidermied Jack Russell terrier entitled “I'm Dead (2010)” is displayed during a media viewing of artist David Shrigley's exhibition at the Hayward Gallery in London, January 31, 2012. (Photo by Olivia Harris/Reuters)

Gallery workers sit next to “Teoria” by Eduardo Basualdo at the Frame Gallery's stand at the Frieze Art Fair in central London, October 16, 2013. (Photo by Andrew Winning/Reuters)

Student visitors pose from inside an installation titled “Crawling from the Wreckage” as part of England-born and Hong Kong-based Simon Birch's solo art exhibition “Hope & Glory” in Hong Kong, May 3, 2010. (Photo by Bobby Yip/Reuters)

A statue by Tony Matelli titled “Sleepwalker” stands in the snow on the campus of Wellesley College in Wellesley, Massachusetts, February 5, 2014. (Photo by Dominick Reuter/Reuters)

A visitor walks within an installation titled “Chairs”, made of wooden chairs by Japanese artist Tadashi Kawamata, during Abu Dhabi Art at Saadiyat island, off the coast of Abu Dhabi, November 7, 2012. (Photo by Jumana El-Heloueh/Reuters)

A visitor passes behind the sculpture “Puma-Dentist” made with plastic, wax and original heads of a puma and a hind by Austrian artist Deborah Sengl during an exhibition at the art gallery Deschler in Berlin, April 15, 2008. (Photo by Fabrizio Bensch/Reuters)

A visitor looks at “Divide” by Australian sculptor Sam Jinks, made of resin, silicon and horse hair, during a preview of the Art Stage Singapore, January 15, 2014. (Photo by Edgar Su/Reuters)

Plastic statuettes of 16th-century Protestant reformer Martin Luther, which are part of the art installation “Martin Luther – I'm standing here” by German artist Ottmar Hoerl, are pictured in the main square in Wittenberg, Germany, August 11, 2010. (Photo by Fabrizio Bensch/Reuters)

A piece by artist David Mach and entitled “Out of Order” shows a row of traditional English red phone boxes in Kingston, south of London, July 15, 2008. (Photo by Eddie Keogh/Reuters)

A man looks at a sculpture by Van De Weghe of U.S. during the Art Basel show in Miami Beach, December 4, 2008. (Photo by Carlos Barria/Reuters)

An art installation by Brazilian artist Eduardo Srur is seen on the Cidade Jardim bridge next to the Pinheiros river, one of the two waterways that flow through the middle of Sao Paulo, September 18, 2014. (Photo by Nacho Doce/Reuters)

Artist Vincent J.F. Huang's installation artwork “Suicide Penguins”, a comment on global warming using glass penguins and a stuffed toy polar bear, hangs below the Millennium Bridge in London, February 13, 2010. (Photo by Luke MacGregor/Reuters)

A sculpture titled “Self-Stretch (Variation 3)” by artist Evan Penny on display at the Melbourne Art Fair, August 4, 2010. (Photo by Mick Tsikas/Reuters)

Pink bicycles placed just above the water celebrate the arrival of the Giro d'Italia in Schalkwijk, a small town ouside of Utrecht, Netherlands, May 4, 2010. (Photo by Michael Kooren/Reuters)

A three dimensional exhibit made from aluminum, silicone, pigment and hair by artist Evan Penny during Art Basel Miami Beach, December 7, 2007. (Photo by Hans Deryk/Reuters)

Sculptures of cockroaches with human faces appear to climb up the facade of the Museo de Bellas Artes during an exhibition in Havana, March 27, 2009. (Photo by Claudia Daut/Reuters)

A woman walks past art sculptures in front of the main entrance of the Art 39 in Basel, June 3, 2008. (Photo by Christian Hartmann/Reuters)

A man stands next to a piece of artwork titled “Bipolar Perversion” by Belgian mix media artist Pascal Bernier, at the Botanique exhibition hall in Brussels, September 26, 2012. (Photo by Yves Herman/Reuters)

Australian artist Nike Savvas makes final adjustments to her art piece consisting of over 50,000 polystyrene balls at the New South Wales Art Gallery in Sydney, August 3, 2006. (Photo by David Gray/Reuters)

A Chinese visitor views a massive sculptural installation filling a factory warehouse at an exhibition by British artist Antony Gormley called “Asian Field” in Shanghai, October 7, 2003. (Photo by Claro Cortes IV/Reuters)

A group of schoolgirls look at a sculpture entitled “Wild man” by Australian sculptor Ron Mueck at the National Gallery of Victoria in Melbourne, February 10, 2010. (Photo by Mick Tsikas/Reuters)

A visitor looks at a monumental sculpture by artist Robert Therrien in the newly opened Metropolitan Arts Centre in Belfast, April 23, 2012. (Photo by Cathal McNaughton/Reuters)