sentences:  In the 1800s the modern Lidognia Zinc Works was added in the area.In 1871 the ironworks were taken over by the holding called "Vereingte Königs- und Laurahütte AG für Bergbau und Hüttenbetrieb", which added a steel mill, rail mill and workshops.In the vicinity of the Royal Coal Mine, "Countess Laura" Coal Mine was opened in 1870, and by 1913–1914 coal production increased to 1 million tons a year.