This three-story-tall mural was painted by international artist Josef Kristofoletti on the side of the ATLAS control room directly above the detector:
This project was inspired by the same questions that physicists are trying to answer; where did we come from, what does it mean to be human, and what is our place in the universe? The artist worked closely with physicists at CERN over the course of a year to create the mural. It depicts the artist's interpretation of what the Higgs boson might look like.
This short, time-lapse video was finished June 2012, using photos that were taken during the project's execution: