A double altar in

Roman Catholicism The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide . It is among the world's oldest and largest international institutions, and has played a ...

is an

altar An altar is a Table (furniture), table or platform for the presentation of religion, religious offerings, for sacrifices, or for other ritualistic purposes. Altars are found at shrines, temples, Church (building), churches, and other places of wo ...

that has a double front. It is constructed in this way so that

Mass Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different element ...

may be celebrated on both sides of it at the same time. These altars were frequently found in churches of religious communities in which the

choir A choir ( ; also known as a chorale or chorus) is a musical ensemble of singers. Choral music, in turn, is the music written specifically for such an ensemble to perform. Choirs may perform music from the classical music repertoire, which s ...

is behind the altar so that whilst one priest is celebrating Mass for the community in choir, another may celebrate for the

laity In religious organizations, the laity () consists of all members who are not part of the clergy, usually including any non-ordained members of religious orders, e.g. a nun or a lay brother. In both religious and wider secular usage, a laype ...

assembled in the church.

References

Mass in the Catholic Church {{RC-stub