Károly Thern (1817 - 1886) Hongrie Károly (Carl) Thern (13 August 1817 – 13 April 1886) was a Hungarian composer, pianist, conductor and arranger. He was among the second generation of composers who developed the language of Hungarian art music.
Thern was born in 1817, either in Jihlava (Iglau in German; now in the Czech Republic) or Spišská Nová Ves (Zipser Neudorf in German, Iglo in Hungarian; now in Slovakia).
He conducted at the National Theatre of Pest in 1840s, and at the Music Lovers' Association of Pest between 1868 and 1873, in succession to Mihály Mosonyi. He was also active as a teacher at the National Conservatory.