III. How is the Sacrament of Baptism Celebrated?

From The Catechism of the Catholic Church

1230
This
initiation has varied greatly through the centuries according to circumstances.
In the first centuries of the Church, Christian initiation saw considerable
development. A long period of catechumenate included a series of preparatory
rites, which were liturgical landmarks along the path of catechumenal
preparation and culminated in the celebration of the sacraments of Christian
initiation.

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER ONE THE SACRAMENTS OF CHRISTIAN INITIATION
  - Article 1 THE SACRAMENT OF BAPTISM
    - III. How is the Sacrament of Baptism Celebrated?

From The Catechism of the Catholic Church – rosary.team