Caterina Medici da Broni (1573–1617) was an Italian woman who was executed for witchcraft. She worked as a domestic servant for the senator Luigi Melzi of Milan. When Luigi Melzi became ill and died in 1616, she was accused of having caused his illness by use of sorcery. She was accused by a former employer, who had suspected her for sorcery when she was in his employ. The charges were confirmed by the testimony of two doctors, Ludovico Settala and Giovanni Battista Selvatico, who had tended to the patient, and failed in curing him.