Eucharistic Miracle – Corporal of Bolsena

Wiki Reference: https://en.wikipedia.org/wiki/Corporal_of_Bolsena

A priest who had been experiencing doubts about transubstantiation was celebrating mass in Orvieto, Italy. Soon after he had consecrated the Eucharist, the host started bleeding onto the corporal (a liturgical cloth) on the altar. The priest, the story goes, ran to the pope who was visiting the town and confessed his sin of doubt. The corporal remains on display in the Cathedral of Orvieto.

Some historians, however, question the veracity of the story, since the first accounts of it don’t appear until about a hundred years after the miracle supposedly took place. Nonetheless, the corporal remains an object of veneration.