"To give one specific example, Leonardo's mural of the Last Supper has come under close scrutiny of late. Historical and Biblical purists have pointed out that he got the table wrong. The architecture is wrong. The drinking vessels and tableware are wrong. Those who are supping are sitting upright, which is wrong. They all have the wrong skin tone, features and dress. The scenery in the background is not Middle Eastern. (The list continues, but you get the idea.)

If you know Leonardo, you also know he did not travel to Jerusalem and spend years researching historical detail. Does that, or his liberal use of artistic license detract from this being a superb painting? My vote is no."

Taken from About Education.