That's probably because this is not the original, but a contemporary copy. There are no halos visible on this high resolution image of the original. https://upl

That's probably because this is not the original, but a contemporary copy. There are no halos visible on this high resolution image of the original. https://upload.wikimedia.org/wikipedia/commons/4/48/The_Last_Supper_-_Leonardo_Da_Vinci_-_High_Resolution_32x16.jpg https://upload.wikimedia.org/wikipedia/commons/4/48/The_Last...