Baroque. Miserere mei, Deus (Have Mercy on me, O God) is a setting of Psalm 51 written in the 1630's and most likely sung in the Sistine Chapel during Good Friday of Holy Week. It is a wonderful example of polyphony in five parts. This work, arranged for5-part Trombone Choir (Ensemble) by Ralph Sauer, is about 5 minutes in length (with repeat) and is appropriate for moderately advanced performers. There is a story that this work was heard twice by a young 14-year-old Mozart during a special visit to theVatican with his father in 1770. He transcribed it perfectly from memory creating the first unauthorized copy (the Church wished to preserve its mystery and forbad copies, threatening excommunication). The very next year it was published in England. -thepublisher