What is the official choir associated with music in the Sistine Chapel?

The official choir associated with music in the Sistine Chapel is the Sistine Chapel Choir.

Known in Italian as the Cappella Musicale Pontificia Sistina, it is the pope’s choir for papal liturgies. Its history reaches back to the Renaissance, when the papal chapel maintained professional singers for worship and ceremonial occasions. The choir is especially associated with the performance of sacred polyphony, a style in which independent vocal lines combine into a richly woven musical texture.

The choir is often confused with the building itself or with the choir of St. Peter’s Basilica, but these are distinct institutions. The Sistine Chapel Choir performs in the chapel and at other papal services, while the basilica has its own musical traditions. Giovanni Pierluigi da Palestrina is strongly associated with the chapel’s musical history, although he was not the institution’s only important composer. The choir’s role is liturgical, not simply that of a concert ensemble.