Beneventan chant is a liturgical plainchant repertory of the Roman Catholic Church, used primarily in the orbit of the southern Italian ecclesiastical centers of Benevento and Monte Cassino distinct from Gregorian chant and related to Ambrosian chant. It was officially supplanted by the Gregorian chant of the Roman rite in the 11th century, although a few Beneventan chants of local interest remained in use.
The Introit (from Latin introitus 'entrance') is part of the opening of the liturgical celebration of the Eucharist for many Christian denominations. In its most complete version, it consists of an antiphon, psalm verse and Gloria Patri, which are spoken or sung at the beginning of the celebration. It is part of the proper of the liturgy: that is, the part that changes over the liturgical year.
In the Roman Rite of the Catholic Church it is known as the antiphona ad introitum (Entrance antiphon), as in the text for each day's Mass, or as the cantus ad introitum (Entrance chant) as in the General Instruction of the Roman Missal, 47 and the First Roman Ordo (sixth to seventh century). In pre-1970 editions of the Roman Missal, the word Introitus was used, distinguished from the normal meaning of the word (entrance) by being capitalized. In Ambrosian chant and Beneventan chant, the counterpart of the Introit is called the ingressa.The Lutheran rite uses the term Introit in the same fashion, marking the opening of the Mass. In the Mozarabic, Carthusian, Dominican, and Carmelite Rites, it is called the "officium".