JR owns the biggest art gallery in the world. He exhibits freely in the streets of the world, catching the attention of people who are not typical museum visitors. His work mixes Art and Act, talks about commitment, freedom, identity and limit. After he found a camera in the Paris subway, he did a tour of European Street Art, tracking the people who communicate messages via the walls. Then, he started to work on the vertical limits, watching the people and the passage of life from the forbidden undergrounds and roofs of Paris.