The Latin Church is the largest particular church within the Catholic Church. It is a particular church not on the level of the local particular churches known as dioceses or eparchies, but on the level of autonomous ritual churches, of which there are 23, the remaining 22 of which are Eastern Catholic Churches.

The Latin Church developed in the Western Roman Empire (Western Europe and North Africa) where, from classical antiquity to the Renaissance, Latin was the principal language of education and culture. The various Latin liturgical rites that developed in that area also use or have used that language.

The 1990 Code of Canons of the Eastern Churches defines its use of the words "church" and "rite" as follows:

In accordance with these definitions, the Latin Church is one such group of Christian faithful united by a hierarchy and recognized by the supreme authority of the Catholic Church as an autonomous particular church. The Latin rite is the whole of the patrimony of that distinct particular church, by which it manifests its own manner of living the faith, including its own liturgy, its theology, its spiritual practices and traditions and its canon law.

The Sacred Heart (also known as Most Sacred Heart of Jesus) is one of the most famous religious devotions to Jesus' physical heart as the representation of his divine love for humanity.

This devotion is predominantly used in the Catholic Church and among some high-church Anglicans and Lutherans. The devotion especially emphasizes the unmitigated love, compassion, and long-suffering of the heart of Christ towards humanity. The origin of this devotion in its modern form is derived from a French Roman Catholic nun, Marguerite Marie Alacoque, who said she learned the devotion from Jesus during a mystical experience. Predecessors to the modern devotion arose unmistakably in the Middle Ages in various facets of Catholic mysticism.

In the Roman Catholic tradition, the Sacred Heart has been closely associated with Acts of Reparation to Jesus Christ. In his encyclical Miserentissimus Redemptor, Pope Pius XI stated: "the spirit of expiation or reparation has always had the first and foremost place in the worship given to the Most Sacred Heart of Jesus". The Golden Arrow Prayer directly refers to the Sacred Heart.