In 1972, artist Gene Davis created Franklin's Footpath, which at the time was the world's largest artwork.
He painted colorful stripes on the street in front of the Philadelphia Museum of Art.
In the photo below, Gene is putting the finishing touches on the 414 foot long painting.
Davis was a member of a group of abstract painters in Washington, DC in the 1960's known as the Washington Color School.
He was famous for his paintings of vertical stripes of color