Lady with an Ermine is a painting by Leonardo da Vinci from around 1489–1490 and one of Poland's national treasures.
The art is situated in National Museum in Kraków.
The small portrait generally called The Lady with the Ermine was painted in oils on wooden panel. At the time of its painting, the medium of oil paint was relatively new to Italy, having been introduced in the 1470s.
The subject has been identified with reasonable certainty as Cecilia Gallerani, who was the mistress of Leonardo's employer.