To honour the 250th anniversary of Mozart’s birth, NDR staged a marathon concert of the dimensions to which the composer himself would have been accustomed: a mixed concert across most of the genres and periods of Mozart’s prolific career. It began, naturally enough, with the first movement of the First Symphony, written by the seven-year-old Wolfgang on a rainy afternoon during the Mozart family’s stay in London. Christoph von Dohnányi then conducted another symphonic first movement, of No.25, composed a decade later and marking a notable advance in symphonic scope and drama on his previous work. The concert’s climax was a complete performance of Der Schauspieldirektor, a musical farce contemporary with Le nozze di Figaro, mocking the pretensions and vanities of opera-singers.