Between 1717 and 1719 the Venetian composer Antonio Lotti visited Dresden, writing opera for the Elector of Saxony (Friederich Augustus I) and it would seem he brought the material for this Requiem with him to finish. The 1719 scores are missing some movements, with the first full version from 1730.
There is a SATB + continuo version, which Lotti seems to have then fleshed out with orchestration. It is set for SSATB choir, with two violins, two violas, two oboes, trumpet, and a large continuo section.
It has perhaps one of the loveliest opening movements of a Requiem, set in the major, almost plainsong in melody, with typical Lotti-style suspensions, use of the old style of counterpoint, and a choral/orchestral style that foreshadows that of Handel and Haydn.