Mossack Fonseca's role in fight over painting stolen by Nazis

Mossack Fonseca helped a New York art gallery defend itself over a claim about a Nazi-looted artwork after the apparent original owner’s descendant launched a legal battle for its return, the Panama Papers reveal.

The case involves a £18m Modigliani painting taken from Paris when the Germans marched into the city in 1940 and the role played by Mossack Fonseca, as the family who say it is theirs fought for its return.

The artwork in question is the 1918 Seated Man With a Cane, and the story of its theft and reemergence blends the injustice of treasures taken during the second world war with the smoke and mirrors of 21st-century offshore tax havens.

The descendant claims the painting was owned by Oscar Stettiner, a Jewish gallery owner in Paris who fled weeks before the Nazis entered the city. He managed to get his wife and children to the Dordogne but had to leave his collection behind.