Charles Sheeler was drawn to the ordinary: a white-walled room, a spiral staircase, an urban roofscape. Using light and shadow as his palette, the 20th century photographer exposed the hidden beauty of these simple, utilitarian compositions. "The [builders] weren't building a work of art," he once said. "If it's beautiful to some of us afterward, it's beautiful because it functioned." "Side of White Barn, Bucks County, Pennsylvania," 1915, by Charles Sheeler | (The Lane Collection, Image Courtesy Museum of Fine Arts, Boston) That celebration of the beauty in functionality is now on exhibit at the Museum of Fine Arts, Boston.