France-based musician who hid his Jewish history from the general public for concern with anti-Semitism among the 19th-century French social elite. He began monitoring in the Paris Conservatoire in 1816. He founded the famous concert hall Salle des Concerts Herz within the rue de la Victoire in 1838. He allegedly wedded famed French courtesan La Paiva whose actual name was Pauline Thérèse Lachmann, even though record continued to be unclear concerning whether the relationship actually happened. He was a prolific composer and published eight piano concertos. He was, nevertheless, fiercely criticized by additional music artists, including Robert Schumann, for his showy, shallow design.