Da Vinci's Lady with an Ermine back on show in Poland

Lady with an Ermine is one of four known portraits of women painted by the Italian Renaissance artist. The other portraits are of Mona Lisa, Ginevra de Benci and La Belle Ferroniere (also known as Portrait of an Unknown Woman).
The portrait is believed to depict Cecilia Gallerani, the mistress of the Duke of Milan, Ludovic Sforza.
The Czartoryskis had acquired the painting around 1800, but it was taken by the Nazis, before being restituted to Poland after World War II.
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