“A district court in Helsinki determined that the married couple at the center of the allegations, gallery owners Kati Marjatta Karkkiainen and Reijo Pollari, duped private collectors and auction houses into paying millions of dollars for paintings purportedly by blue-chip modernists and Impressionists such as Henri Matisse, Pierre-Auguste Renoir, Claude Monet, and Wassily Kandinsky; lesser-known Russian romanticists; and works by the popular 19th-century Finnish painter Albert Edelfelt.”