During the Middle Ages and the Renaissance, sacred musical genres were generally considered to be ensemble vocal music, usually sung by a group.

Capella group

Explanation:

    In Renaissance music, as a historical and artistic continuity that had been developed mainly in the last three centuries of the Middle Ages, the polyphonic choral style "capella" reached its peak - that is, the singing of several voices, performed by soloists, or by a or more choirs, without instrumental accompaniment. This music was embodied, through counterpoint techniques, perfected by schools in the Netherlands and through the Franco-Flemish influence widespread throughout Europe.