IV. Where is the Liturgy Celebrated?

From The Catechism of the Catholic Church

1182
The
altar of the New Covenant is the Lord’s Cross,⁵⁹ from which the
sacraments of the Paschal mystery flow. On the altar, which is the center of
the church, the sacrifice of the Cross is made present under sacramental signs.
the altar is also the table of the Lord, to which the People of God are
invited.⁶⁰ In certain Eastern liturgies, the altar is also the symbol
of the tomb (Christ truly died and is truly risen).

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION ONE THE SACRAMENTAL ECONOMY
- CHAPTER TWO THE SACRAMENTAL CELEBRATION OF THE PASCHAL MYSTERY
  - Article 1 CELEBRATING THE CHURCH’S LITURGY
    - IV. Where is the Liturgy Celebrated?

From The Catechism of the Catholic Church – rosary.team