Christoper Walker Bielsko-Biala, Poland   Self-portrait titled Portrait of the Artist, 1878, The Metropolitan Museum of Art The year is 1868, and the twenty-two year-old Mary Cassatt has had her first painting, The Mandolin Player, accepted by the famous Paris Salon. The painting is in the realist style and is reminiscent of Rembrandt’s 1659 Self-Portrait. The background…