Toward the back of our venerable 1962 Missale Romanum there are Mass formularies for special feasts. Today, for example, we find Our Lady of the Miraculous Medal.
Our Lady appeared to a Sister of Charity of the Rue du Bac in Paris, St. Catherine Labouré, and showed her the pattern of a medal. Through this medal many miracles have been granted through God by Mary’s intercession.
Domine Iesu Christe, qui beatissimam Virginem Mariam matrem tuam ab origine immaculatam innumeris miraculis clarescere voluisti, concede: ut eiusdem patrocinium semper implorantes, gaudia consequamur aeterna: Qui vivis et regnas cum Deo Patre.
O Lord Jesus Christ, who desired that Your Mother, the most Blessed Virgin Mary, immaculate from her conception, should shine with countless miracles, grant that we, ever imploring her patronage, may attain eternal joys.
Remember, dear readers, if we don’t believe in miracles, we won’t ask for miracles. And if we don’t ask for miracles, we won’t obtain miracles.
I see that Fr. Hunwicke has written something of interest at his place, about John Henry Newman, Alphonse Ratisbonne (converts, both) and the Miraculous Medal.