Culinary Historians | The History of Bread in Medieval Europe
In his Summation of All Theology (published in the 1260s), Thomas Aquinas stated categorically that God was not present in sacred breads made from any grains other than wheat. Aquinas further advised that the wheaten host should be made as small, flat, white discs without any leavening, completely unlike the bread people ate at home. Yet a thousand years earlier Christians had celebrated Jesus’s Last Supper using whatever breads they had at hand.