The names of the saints, Bartholomew and Catherine, are on a cartellino (or small paper) painted on the gold background. Saint Catherine stands by the wheel on which she was tortured and Saint Bartholomew holds a flaying knife, the instrument of his martyrdom. The panel was the right-hand panel of a triptych, or possibly a polyptych. Once catalogued as Florentine School, the panel is now attributed to Francescuccio Ghissi and Allegretto Nuzi on the basis of the decorative punchwork which is similar to that on other works associated with Allegretto.