Giacomo Puccini's Messa or Messa a quattro voci (currently more widely known under the apocryphal name of Messa di Gloria) is a Mass composed for orchestra and four-part choir with tenor, bass and baritone soloists. Strictly speaking, the piece is a full Mass, not a true Messa di Gloria (which contains only the Kyrie and Gloria and omits the Credo, Sanctus, Benedictus and Agnus Dei).