And, of course, in City of Death the Doctor manages the exact same thing, slipping a copy of the Mona Lisa with “THIS IS A FAKE” written on it into the Louvre itself.
Shouldn't they also notice that the painting is now on canvas not wood? Is this maybe an attack on Bernard Berenson, who could not remember what surface a supposed Leonardo was painted on when he pronounced on its authenticity (a matter in which he had a financial interest)?
