 At the time of the portrait, she was around thirteen years old.Leonardo painted three other portraits associated with the family or court of Ludovico Sforza.The Polish scholar Bogdan Horodyski in 1954-1956 reached the conclusion that the Warsaw illumination refers to both the deceased dukes Galeazzo Maria and Gian Galeazzo and to the dynastic downfall after the usurpation of Ludovico il Moro.