For scholars, this work is an example of Leonardo's experiments on the theme of the so-called shoulder portrait, with the view from the back and the face turned towards the observer, the result of the teachings of Leonardo's master, Andrea del Verrocchio, on how to portray a figure in motion, taking it from various points of view. Dating from around 1483-1485, it is probably a preparatory study for the Angel of the Virgin of the Rocks, a pictorial work whose first version is kept in the Louvre in Paris, the second in the National Gallery in London. The drawing has also been identified with Cecilia Gallerani, the young woman loved by Ludovico Sforza and represented in the painting preserved in Krakow, The Lady with an Ermine. In 1952, on the occasion of the fifth centenary of Leonardo's birth, the American art historian Bernard Berenson called the portrait the most beautiful drawing in the world.