- G. Kaleschke
German family of organ builders. They originally came from Thuringia, but worked until about 1703 in the Worms and Darmstadt region, then in Dürkheim (Leiningen) and subsequently in a wider area. Augustinus Hartung (1677–1739) established a thriving workshop, working initially in the mid-German and later in the south German tradition. About ten of his organs survive. His son Johann Michael Hartung (b Dürkheim, 3 Feb 1708; d Dürkheim, 13 Jan 1763), first mentioned as an independent builder in 1733 but still associated with his father in 1737, became the most important member of the family and was widely acknowledged and respected; under his direction the firm attained great importance, and at his death he was an alderman and police official. Only some 13 one- and two-manual organs have been attributed to him but he might have built many more; his last known project was for Assenheim in ...