The Halle–Bebra railway, known in German as the Thüringer Bahn ("Thuringian Railway"), is a 210 kilometre-long railway line from Halle (Saale) via Erfurt and Gerstungen to Bebra, mainly in Thuringia. As far as Gerstungen the line originally belonged to the Thuringian Railway Company. From Gerstungen to Bebra, it was owned by the Frederick William Northern Railway (Friedrich-Wilhelms-Nordbahn), named after the Prussian king, Frederick William IV. It is now a two-track, electrified, standard gauge mainline operated by DB Netze. It was opened between 1846 and 1849 and was the first railway line in Thuringia (apart from a small piece of the Leipzig–Hof line of the Saxon-Bavarian Railway Company —Sächsisch-Bayerische Eisenbahn-Compagnie— near Altenburg). All types of trains from Regionalbahn to ICE currently run on the line except Interregio-Express. Four of the six largest cities in Thuringia are located on the line.