A ceiling fresco in the Casino dell'Aurora, a palace in Rome, known as <i>Pluto, Neptune, and Jupiter</i>, is being consolidated and cleaned. A description in GiovanPietro Bellori's 1672 book, <i>The Life of the Painters</i>, described a painting commissioned for the palace by Cardinal De Monte, and executed by Caravaggio (1569?-1609). Removal of repaint has revealed a technique which experts find to be more characteristic of Caravaggio than the pretreatment appearance.