Mass setting

The Mass (Latin: Missa), a form of sacred musical composition, is a choral composition that sets the invariable portions of the Eucharistic liturgy (principally that of the Catholic Church, the Anglican Communion, and Lutheranism) to music. Most Masses are settings of the liturgy in Latin, the liturgical sacred language of the Catholic Church's Roman liturgy, but there are a significant number written in the languages of non-Catholic countries where vernacular worship has long been the norm. For example, there are many Masses (often called "Communion Services") written in English for the Church of England. Musical Masses take their name from the Catholic liturgy called "the Mass" as well.

Masses can be a cappella, that is, without an independent accompaniment, or they can be accompanied by instrumental obbligatos up to and including a full orchestra. Many Masses, especially later ones, were never intended to be performed during the celebration of an actual mass.

A distinction is made between texts that recur for every mass celebration (ordinarium, ordinary), and texts that are sung depending on the occasion (proprium, proper). For example, for the Tridentine Mass:

A Missa tota ("full Mass") consists of a musical setting of the five sections of the ordinarium as listed below.

In the Tridentine Mass, the Kyrie is the first sung prayer of the Mass ordinary. It is usually (but not always) part of any musical setting of the Mass. Kyrie movements often have an ternary (ABA) musical structure that reflects the symmetrical structure of the text. Musical settings exist in styles ranging from Gregorian chant to Folk.

...
Wikipedia