The Semmering Railway, opened on 17 July 1854, was one of the first true mountain railways, traversing a section of the Austrian Alps. It was characterized by steep gradients and sharp curves. To work this railway a new design of locomotive was developed.
Wilhelm Freiherr von Engerth
Wilhelm Freiherr von Engerth (26 May 1814 – 4 September 1884) was an Austrian architect and engineer, known for being the designer of the first practical mountain locomotive.