11/22/2013 07:30 pm ET Updated Jan 25, 2014

82nd & Fifth: BOY GENIUSES by Timothy B. Husband (VIDEO)

It took three brothers ranging in age from about fourteen to twenty some four years to illuminate this exquisite work. "In the center of the book, they're struggling with their compositional arrangements," says curator Timothy B. Husband, "but as they progress, they become incredibly inventive."

Flip through a selection of pages from the Belles Heures.