...The enigmatic work, which hangs in the Louvre in Paris, has been the subject of speculation for centuries. Now Donato Pezzutto, a Canadian doctor and amateur art historian, has come up with a startling theory about the work’s background.

He maintains if the right and left halves of the painting are reversed and aligned, the landscape that emerges is a scene from central Italy which corresponds to the da Vinci’s own map of the area....