The baptism of newborns in Medjugorje takes place in the parish church, St James's Church.
What is Christian Baptism? Here are some extracts from the catechism of the Catholic Church.
“1214 It is called Baptism according to the central rite by which it is carried out: to baptize (in Greek baptizein) means“ to dive ”,“ to immerse ”; the "diving" in water symbolizes the burial of the catechumen in the death of Christ from which he leaves by the resurrection with him (cf. Rom 6, 3-4; Col 2, 12), as "new creature" (2 Cor 5:17; Ga 6:15). "
"Baptism is the most beautiful and the most magnificent of the gifts of God ... We call it gift, grace, anointing, illumination, garment of incorruptibility, bath of regeneration, seal, and all that is there. more valuable. Gift, because it is conferred on those who contribute nothing; grace, because it is given even to the guilty; Baptism, because sin is buried in water; anointing, because it is sacred and royal (such are those who are anointed); illumination, because he is shining light; clothing, because it veils our shame; bath, because it washes; seal, because it keeps us and it is the sign of the Lordship of God (S. Gregory of Naz., or. 40, 3-4: PG 36, 361C). "
The Baptism of Christ
“1223 All the prefigurations of the Old Covenant find their completion in Christ Jesus. He begins his public life after being baptized by St. John the Baptist in the Jordan (cf. Mt 3:13), and, after his resurrection, he gives this mission to the apostles: "Go therefore, from all nations. make disciples, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to observe all that I have commanded you "(Mt 28, 19-20; cf. Mk 16, 15-16). "
Source: www.vatican.va