The Eucharistic miracle of the Christmas Mass in Legnica, Poland.

The Eucharistic Miracle of Legnica is considered one of the most recent and well-documented cases recognized by the Catholic Church. The event began on December 25, 2013, during Christmas Mass at the Church of St. Hyacinth. A consecrated Host accidentally fell to the floor during Communion. Following liturgical norms, the parish priest, Father Andrzej Ziombra, placed the Host in a container of water to allow it to dissolve. 

However, when checking the container on January 5, 2014, it was discovered that the Host had not fully dissolved and now featured a distinct red stain.

The Bishop of Legnica at the time, Stefan Cichy, established a commission to observe the phenomenon. In February 2014, fragments of the Host were sent to two separate institutes of forensic medicine:

The Wrocław Institute: Initial exams ruled out the presence of fungi or bacteria that could explain the coloration 

The Szczecin Institute: Detailed histopathological analyses reached a startling conclusion. The material was identified as human striated cardiac muscle tissue. Furthermore, the tissue showed typical signs of intense distress, such as fragmentation and necrosis—alterations commonly associated with states of agony, such as severe trauma or a heart attack.

After reviewing the reports and sending the documentation to the Congregation for the Doctrine of the Faith at the Vatican, the new Bishop of Legnica, Zbigniew Kiernikowski, officially announced the recognition of the miracle on April 10, 2016. He authorized the exposition of the miraculous Host for the veneration of the faithful

Since this official approval, many miracles and testimonies of healings have been reported and attributed to the Eucharistic miracle of Legnica.

_{References: Diocese de Legnica, Miracoli Eucarístici, Immaculate Conception Church, Santuário Nossa Senhora do Perpétuo Socorro}