Mother church or matrice is a term depicting the Christian Church as a mother in her functions of nourishing and protecting the believer. It may also refer to the primary church of a Christian denomination or (arch)diocese, i.e. a cathedral church. For a particular individual, one's mother church is the church in which one received the sacrament of baptism. The term has specific meanings within different Christian traditions. Catholics refer to the Catholic Church as "Holy Mother Church".
Mother church architecturally represented in a mosaic of a fifth-century chapel floor (tomb marker/cover of a certain Valentia with the added invocation to rest in peace: Valentia in Pace). Bardo Museum, Tunis.
Turku Cathedral, the Mother Church of the Evangelical Lutheran Church of Finland
On Mothering Sunday, people historically have visited the church in which they were baptized.
The Aedicule, before its restoration, encloses the tomb of Jesus, in the Church of the Holy Sepulchre in Jerusalem
The Archbasilica of Saint John Lateran is the Catholic cathedral of the Diocese of Rome in the city of Rome, and serves as the seat of the bishop of Rome, the pope. The archbasilica lies outside of Vatican City proper, which is located approximately four kilometres northwest. Nevertheless, as properties of the Holy See, the archbasilica and its adjoining edifices enjoy an extraterritorial status from Italy, pursuant to the terms of the Lateran Treaty of 1929. Dedicated to the Christ, in honor of John the Baptist and John the Evangelist, the place name, Laterano (Lateran) comes from an ancient Roman family (gens), whose palace (domus) grounds occupied the site; the adjacent Lateran Palace was the primary residence of the pope until the Middle Ages.
Façade of the Archbasilica of the Most Holy Savior at the Lateran
Next to the formal entrance is the archbasilica's declaration to be the head, or Mother Church, of the entire world. Note the laurel wreath and the Papal tiara.
The papal cathedra, the presence of which renders the archbasilica the cathedral of Rome, is located in its apse. The decorations are in cosmatesque style.
The high altar and the 14th-century Gothic ciborium. The relic of the original wooden altar used by Saint Peter comprises the high altar. Above the ciborium are statues of Sts. Peter and Paul.