The article, Study: Last Supper paintings supersize the food, explains that there have been other foods besides bread and wine being involved in the painting of The Lord's Last Supper.
However, it also says that "The study is 'not very meaningful science,' said Martin Binks, a behavioral health psychologist and a consultant at Duke University Medical Center. 'We have real life examples of the increase in portion size — all you have to do is look at what's being sold at fast-food restaurants.'
A more contemporary test would be to analyze portion sizes in Super Bowl commercials, he suggested.
'That would be a much more meaningful snapshot of how this society's relationship to food has changed,' Binks said."