"The Last Supper"

Painting by Leonardo da Vinci, courtesy Scala/Art Resource, New York

Location: Santa Maria delle Grazie, Milan, Italy

Leonardo's work habits frustrated many of his patrons. Many times he was observed staring at his paintings for hours without ever lifting his brush to paint. When the prior of the Santa Maria delle Grazie hounded Leonardo to hurry up and finish his painting of the Last Supper, Leonardo in turn threatened to use the prior as his model for when he painted Judas.