Banksy is a famous anonymous street artist from Bristol, England whose graffiti and mural style artwork often contains political messages. He began working in the early 1990s and has published several books of his artwork. One location Banksy has worked is the West Bank barrier, a controversial wall constructed by Israel along the Green Line border and inside the West Bank. The barrier is meant to prevent terrorism but is also criticized for restricting Palestinians' freedom of movement. Banksy's murals on the barrier depict themes of escapism and protest against the wall. He uses simple materials like spray paint and stencils to efficiently create large scale artwork with messages against unlawful barriers.