The Eucharistic Miracle of Santarem, together with that of Lanciano, is considered among the most important. Numerous studies and canonical analysis were carried out on the relics. The Host changed into bleeding Flesh and Blood flowed out of it. Both relics are preserved to this day in the Church of St. Stephen in Santarem.
The woman stole the Host and hid it in a linen cloth that immediately became stained with Blood.