Near the harbor of Großräschen, a small town in Brandenburg, Germany, you can walk through the stately entrance of the Seehotel and place a two-euro coin on the front desk. In return, a receptionist will lead you behind a locked door, where you can see the Mona Lisa. A few rooms on the ground floor of the hotel are filled with paintings by the Posin brothers, a trio of Russian artists who copied the Old Masters in their studio in nearby Berlin. Their fake Rembrandts, Gaugins, El Grecos, Klimts, and…
