The 750 mm (2 ft 5 1⁄2 in) gauge Mügeln railway network (Mügelner Netz) was a network of narrow gauge lines in Saxony, eastern Germany, running between Oschatz, Döbeln, Neichen, Strehla and Lommatzsch, whose operational hub was at Mügeln. The routes were built primarily to reach the rural hill country of central Saxony. Mügeln station was once one of the largest narrow gauge railway stations in Europe.
On 7 January 1885 the first section of the route between Mügeln and Oschatz was opened. In 1920 it was taken over by the Deutsche Reichsbahn.
The survival of the Kemmlitz–Mügeln–Oschatz line since 1975 is mainly thanks to the transportation of kaolin.
In November 1993 the Deutsche Reichsbahn transferred the remaining section of line to the newly founded private railway company, Döllnitzbahn. This had been formed in 1993 as the result of an initiative by the district of Torgau-Oschatz and the passenger association, Pro Bahn. The primary aim of the company was initially the preservation of the existing goods traffic from the kaolin mine in Kemmlitz. For that purpose, second-hand, narrow gauge, goods wagons were bought from the Mansfeld mining railway and a new transshipment site to the standard gauge railway network was built in Oschatz. With the help of used PKP diesel locomotives, they succeeeded initially in keeping the goods traffic going. In spite of this, the demand gradually fell so that goods services had to be closed in 2001. The Döllnitzbahn was the last narrow gauge railway in Saxony to run public freight services.
The Förderverein Wilder Robert ('Society for the Promotion of the 'Wild Robert') was founded in 1994 with the aim of preserving the historic sites and vehicles of the so-called Wilder Robert or 'Wild Robert' line. To begin with the society's sphere of activity was the running of special trips with the existing, operational vehicle fleet using, amongst others, the Saxon IV K steam locomotives, nos. 99 561, 99 574 and 99 584.