The mosaic is made of 4,242 officially licensed Rubik’s Cubes. It measures 19′ x 8’6″ x 2.25″ (5.8m x 2.6m x 5.7cm ). (via Dream Big « Pete Fecteau)
Pete is now working on an Albert Einstein version, but needs some pledges on Kickstarter.
Source: petefecteau.com

