Christian Boesch at the Metropolitan Opera, as Papageno. He returned for the same opera in 1981 (now with Lucia Popp and Gail Robinson alternating as Pamina, and Zdzisława Donat as the Queen of Night), and the same season sang Monsieur Presto in the Met premiere of "Les mamelles de Tirésias" (directed by John Dexter). In 1983, he appeared again at that theatre for their Centennial Gala and "Don Giovanni" (as Masetto), opposite James Morris, Edda Moser, Carol Neblett, Paul Plishka, Roberta Alexander and John Macurdy. His final appearances at the Met were in the title part of "Wozzeck", in 1985. In 1989,
Piano concertos by Wolfgang Amadeus Mozart it was probably J.C. Bach, whom Mozart admired, who introduced the structural innovation of allowing the keyboard to introduce new thematic material in its first entry. Concertos Nos 1–4 (K. 37, 39, 40 and 41) are orchestral and keyboard arrangements of sonata movements by other composers. The next three concertos (K. 107/1, 2 and 3), which are not numbered, are arrangements of piano sonatas by J.C. Bach (Op 5. Nos. 2, 3, and 4, all composed by 1766). Based on handwriting analysis of the autographs they are believed to date from 1771–72. Concerto No. 5, K. 175 from 1773 was