From Wikipedia:

JR (born 22 February 1983^[1]) is the name of a photographer and artist whose identity is unconfirmed.^[2] He has described himself as a “photograffeur”, he flyposts large black-and-white photographic images in public locations in a manner which is similar to the appropriation of the built environment by the graffiti artist.^[2] He states that the street is “the largest art gallery in the world.”^[3][4] He started out on the streets of Paris.^[5] JR’s work “often challenges widely held preconceptions and the reductive images propagated by advertising and the media.”^[5]

JR’s work combines art and action and deals with commitment, freedom, identity and limits.^[6] He has been introduced by Fabrice Bousteau as: “the one we already call the Cartier-Bresson of the 21st century”.^[7] On 20 October 2010, JR won the TED Prize for 2011. “The TED Prize is awarded annually to an exceptional individual who receives $100,000 and, much more important, ‘One Wish to Change the World.’ Designed to leverage the TED community’s exceptional array of talent and resources, the Prize leads to collaborative initiatives with far-reaching impact.”^[8]