Bolsena-Orvieta, Italy
Again, a priest has difficulties believing in the Real Presence, and blood begins seeping out of the Host upon consecration. Because of this miracle, Pope Urban IV commissioned the feast of Corpus Christi, which is still celebrated today.
Eucharistic Miracle in Lanciano, Italy Lanciano, Italy -- 8th century A.D.
A priest has doubts about the Real Presence; however, when he consecrates the Host it transforms into flesh and blood. This miracle has undergone extensive scientific examination and can only be explained as a miracle. The flesh is actually cardiac tissue which contains arterioles, veins, and nerve fibers. The blood type as in all other approved Eucharistic miracles is type AB! Histological micrographs are shown.
Physician Tells of Eucharistic Miracle of Lanciano - (Zenit)
"Dr. Edoardo Linoli says he held real cardiac tissue in his hands, when some years ago he analyzed the relics of the Eucharistic miracle of Lanciano, Italy."
http://www.therealpresence.org/eucharst/mir/a3.html