On 23 March 1783, an important concert took place in Vienna, playing a considerable role for Mozart’s reputation in the imperial capital, where he had resided since 1781. It is obvious that Mozart wanted to be heard in both what he had composed prior to 1781, as well as in his more recent works. From the Salzburg repertoire, he borrowed the ‘Haffner’ Symphony. To this he added the long concertante movement for wind instruments from the ‘Posthorn’ Serenade. Here we also find two piano concertos (one from Salzburg, and the latest, doubtless composed for the occasion), several arias from earlier operas (Lucio Silla, Idomeneo) or again, recently written. Although he played his concertos, he also improvised keyboard variations and even a fugue (because the emperor was in attendance)… An historic concert to be rediscovered, as if you were there!