In 1833 his family moved to Pest, which in 1873 was united with Buda and Óbuda to form Budapest. There from 1836 (age 5) he studied violin with the Polish violinist Stanisław Serwaczyński, the concertmaster of the opera in Pest, said to be the best violinist in Pest. Although Joachim's parents were "not particularly well off", they had been well advised to choose not just an "ordinary" violin teacher. Joachim's first public performance was 17 March 1839 when he was of age 7. (Serwaczyński later moved back to Lublin, Poland, where he taught Wieniawski.) In 1839, Joachim continued his studies at the Vienna Conservatory (briefly with Miska Hauser and Georg Hellmesberger, Sr.; finally – and most significantly – with Joseph Böhm, who introduced him to the world of chamber music). In 1843 he was taken by his cousin, Fanny Figdor, who later married "a Leipzig merchant" named Wittgenstein, to live and study in Leipzig. In the journal "Neue Zeitschrift fůr Musik" Robert Schumann was highly enthusiastic about Felix Mendelssohn, on which Moser writes "Only in Haydn's admiration for Mozart does the history of music know a parallel case of such ungrudging veneration of one great artist for his equal." in 1835, Mendelssohn had become director of the Leipzig Gewandhaus orchestra. In 1843 Joachim became a protégé of Mendelssohn, who arranged for him to study theory and composition with Moritz Hauptmann and violin with Ferdinand David. In his début performance in the Gewandhaus Joachim played the "Otello Fantasy" by Heinrich Wilhelm Ernst.