54 Just as notable a contribution to this progressive transformation was made by devotional trends and practices not directly related to the sacred liturgy, which began to appear, by God's wonderful design, in later periods, and grew to be so popular. We may instance the spread and ever mounting ardor of devotion to the Blessed Eucharist, devotion to the most bitter passion of our Redeemer, devotion to the most Sacred Heart of Jesus, to the Virgin Mother of God and to her most chaste spouse.
Source: Mediator Dei (Vatican.va)