This painting was almost certainly commissioned in Rome by Caravaggio’s first patron, Cardinal Francesco Maria del Monte. Captured in a strikingly natural pose, the figure of St Catherine has been identified as Fillide Melandroni, a celebrated courtesan of the time. Richly dressed in robes befitting a princess, and kneeling on a cushion, she gazes out at the viewer surrounded by the attributes of her martyrdom: the breaking-wheel, the sword with which she was beheaded and the martyr’s palm.