The author discovered, in the National Museum of Art at Odessa, a pair of unpublished paintings by Stefano Maria Legnani, known as il Legnanino (Milan, 1661–1713): Susanna and the Elders and Judith and Olophernes. The composition of this large format pair was known until recent time only through two grisailles published in Marina Dell’Omo’s monograph on Legnanino (1998). The author has also linked the Odessa painting of Susanna with an eponymous version in the Galleria Tornabuoni Arte (Florence). The existence of these two versions brought the author to the hypothesis that Legnanino composed and kept cartoons of his compositions, to be used for autograph and studio replicas of his own works. Legnanino was also acquainted with prints, as demonstrated by the comparison between Susanna’s body and that of the eponymous figure in an Annibale Carracci’s print. Equally, Judith’s figure is based on the eponymous work of Guido Reni, very famous and frequently copied in the 17th and 18th Centuries.