O zittre nicht, mein lieber Sohn him, then tells the sad, although misleading, tale of Pamina's abduction by Sarastro, and finally makes a stirring plea to Tamino to rescue her daughter. As the aria ends, the Queen and the Three Ladies leave the stage, leaving the astonished Tamino to ponder his task and gather his resolve. A performance takes about five minutes. The verse to which the aria was set was written by the opera's librettist Emanuel Schikaneder. Schikaneder was the impresario for whom the opera was written as well as the first performer of the role of Papageno. <poem lang="de" style="float:left;"> O zittre nicht, mein
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