"Heinrich Ludwig Egmont Dorn (14 November 1800 or 1804-10 January 1892) was a German conductor, composer, teacher, and journalist. He was born in Königsberg (now known as Kaliningrad), where he studied piano, singing, and composition. Later, he studied in Berlin with Ludwig Berger, Bernhard Klein, and Carl Friedrich Zelter. His first opera, Rolands Knappen, was produced in 1826, and was a success. Around this time, he became co-editor of the Berliner allgemeine Muzikzeitung.
Dorn became well known as a conductor of opera, and held theatre posts at Königsberg (1828), Leipzig (1829–32), Hamburg (1832), Riga (1834–43), and Cologne (1844–8). In 1849, he became co-conductor, with Wilhelm Taubert, of the Berlin Hofoper - a post he held until 1869." - (en.wikipedia.org 11.08.2021)