This composer’s Opus 1 is a collection whose last piece includes two Grave (“GRAH-vay”) movements surrounding a Largo e puntato movement built on a seven-note descending bass part. A piece by this composer (-5[1])begins with seven bars of a 3/4-time Vivace (“vee-VAH-chay”), which then switches to a 4/2-time Grave played “without ornaments.” That piece by this composer begins its Allegro second movement with two solo violins playing a contrapuntal passage that begins “G, G, A, F-sharp.” This composer was so offended by a high-pitched violin part that he refused (-5[1])to play a Handel piece. This composer’s Opus 5 is a set of (-5[1])12 (-5[1])violin sonatas, (10[1])the last (10[1])of which is a set of variations on La Folia. (10[5]-5[1])Handel’s (10[1])Opus 6 concerti (10[1])grossi are modeled (10[1])after this composer, whose own Opus 6, No. 8 ends with a Pastorale (10[1])ad libitum. For 10 points, name this Baroque composer of the Christmas Concerto. (10[4])■END■ (10[8]0[1])