"Friedrich Harkort (February 22, 1793, Hagen - March 6, 1880), known as the "Father of the Ruhr," was an early prominent German industrialist and pioneer of ...
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industrial development in the Ruhr region.
In 1819, he founded the first industrial workshop at Castle Wetter. An early proponent of railroads, he proposed the construction of a railway line from Cologne to Minden in 1825, which eventuated as the Cologne-Minden trunk line, completed in 1847. In 1826 he built a small test track, as a monorail following a design of the Englishman Henry Robinson Palmer." - (en.wikipedia.org 29.01.2020)
