
Pope Urban IV investigated this occurrence and determined it to be an authentic miracle. As he said Mass, at the words of consecration, blood began to stream from the host, dripping onto the corporal on the altar. In 1263, a German priest named Peter of Prague was struggling with doubts about the teaching on transubstantiation. As the summary of the results available at puts it: “Science, aware of its limits, has come to a halt, face to face with the impossibility of giving an explanation.” In 1976, the World Health Organization and United Nations released the results of their study. The blood type was identified as AB, which is identical to the blood type on the Shroud of Turin and consistently identified as the type in eucharistic miracles involving the Precious Blood. It was determined that the flesh is cardiac tissue, specifically from the left ventricle of the heart, and by all appearances, the blood appeared to be fresh, certainly not over a millennium old. The World Health Organization, the United Nations, and others conducted studies. In the twentieth century, the preserved physical specimen of this miracle was subjected to rigorous scientific investigations. To this day, the flesh and blood are preserved, and on display, after more than twelve hundred years. As he was saying Mass one day, at the words of consecration, the bread and wine transformed into flesh and blood-even according to the senses. A priest in that city was having doubts about the Real Presence of Christ in the Eucharist. Perhaps the most famous, or at least often considered the quintessential, eucharistic miracle occurred in Lanciano, Italy in the eighth century. In honor of this month traditionally dedicated to reverencing the Most Precious Blood of Jesus Christ, we are going to look at a few eucharistic miracles where blood played a significant role. The Holy Sacrifice of the Mass is sometimes referred to as an unbloody sacrifice, re-presenting Christ’s sacrifice on Calvary, but without the visible manifestation of the Precious Blood.

While it is hard to scientifically verify such miracles (did the blood actually come from the host? Was this cardiac tissue actually initially a piece of unleavened bread?), there is an ever-increasing corpus of Eucharistic miracles, which have helped many people come to a stronger faith in the Real Presence of Christ in the Eucharist. There have been dozens, even hundreds, of spectacularly documented eucharistic miracles through the centuries. What people typically mean when using that term, however, is some sort of physical manifestation of that reality: the bread visibly becomes human flesh, blood pours from the host, etc. This is the quintessential eucharistic miracle. As Catholics, we believe that a miracle occurs at every Mass: bread and wine truly become Jesus Christ-body, blood, soul, and divinity-while seeming, according to the senses, to remain bread and wine.
