Erich Donnert

Johann Friedrich Hartknoch (sometimes referred to as Johann Friedrich Hartknoch the Elder to distinguish him from his son; 28 September 1740 – 1 April 1789) was a Baltic German book publisher. He came from a poor family in Gołdap and took up work at the firm of a publisher and book trader while he was a student at the University of Königsberg. In 1762, he established his own business in Jelgava and soon afterwards moved to Riga. In Riga, at the time part of the Russian Empire, he developed an i…