This a manuscript copy of two Mass movements, Kyrie and Gloria, gathered from a "Messa à 4." The copyist, Vincenso Marchetti, attributed this mass to the composer Matteo Bisso. The texts of both movements of the Mass are divided in several sections and set musically for an ensemble of mixed choir (S.A.T.B), vocal soloists, strings and basso continuo. Each section reflects changes of tonality, tempo, and musical meter. The composer indicated dynamics, the use of muted strings (e.g., p.[84]) and performance indications such as unison and col parte (e.g., p. [76] and p.[79]). The last section for the Chirie [sic] is set musically as a slow fugue in triple meter.