L'Ascensione di San Giovanni

A detail of the “Ascension of Saint John” by early 14th century Italian painter Giotto is illuminated with ultraviolet light in the Peruzzi Chapel of Florence’s Basilica di Santa Croce, during a media tour, Wednesday, March 9, 2010. According to researchers working on a study on Giotto’s painting techniques, sponsored by the Getty Foundation, with the use of ultraviolet rays they discovered Giotto’s original drawings beneath his murals in the chapel. The ultraviolet rays, which capture organic materials like egg tempera and oil which Giotto used, unveiled colors, marks, and brightness not visible in natural light.
(AP Photo/Lorenzo Galassi)