See No Evil is a collection of works of public art by multiple graffiti artists, located around Nelson Street, Bristol, UK. The initial event to create the artwork took place over the weekend of 20/21 August 2011 and was Europe's largest street art festival at the time. It culminated with a block party. The street was mostly repainted in a repeat event in 2012.
Source : Wikipedia https://en.wikipedia.org/wiki/See_No_Evil_(artwork)