From 1P5:
Starting in the 12th century, there began what I like to call
the Eucharistic Revolution. It began with Hildebert of Lavardin coining
the word “Transubstantiation.” Then began the penning of stories about
the Holy Grail; not very reliable as a source of history, they
nevertheless incorporate stories of Eucharistic Miracles that would
repeatedly occur in real life down to – especially in – our time. During
the period they grew in popularity in the 13th century,
Transubstantiation was defined as the best way to describe what happens
at the Mass, and St. Juliana of Cornillon had her visions which led to
the great feast of Corpus Christi. This turn led to the growth of
Eucharistic processions, adoration, and much more. But in 1199, Christ
appeared to St. Lutgarde of Saint-Trond. This is the first medieval
apparition of the Sacred Heart passed down to us through Tradition.
At the same time, devotion grew to Our
Lord’s Five Wounds, and their connection to the Eucharist was not
unnoticed – after all, it was the same blood that came down daily upon
each Altar, was reappearing in miracles (sometimes bleeding from hosts
and at others from images of Our Lord), and relics of which were being
brought back along a great many others from the Holy Land and
Constantinople, thanks to the Crusades. Ss. Gertrude the Great and
Mechtilde – both in the Abbey of Helfta, received visions of the Sacred
Heart, and St. Bonaventure, and a great many other preached about this
Heart and the Blood that flowed from it.
When the Protestant Revolt broke out, the
Pilgrims of Grace in England marched against the King’s men under the
banner of the Five Wounds. St. Ignatius of Loyola in his Anima Christi
Prayer united all elements of devotion to Christ – and St. Peter
Canisius spoke frequently of Christ’s Heart and Blood in defence of His
Real Presence in the Eucharist; a theme taken up by many Catholic
preachers fighting the new heresies.
[...]
When the French Revolution broke out in 1789, and drowned that word in
fire and blood, the imprisoned Louis XVI privately consecrated the
country to the Sacred Heart and vowed to do so publicly if restored to
power. This did not happen, as we know. But from the Vendée to Spain to
Tyrol, the Sacred Heart became the symbol of Catholic resistance to the
revolution. Afterwards, it was a big part of the Catholic Restoration. (Read more.)