The Gotthard railway (German: Gotthardbahn; Italian: Ferrovia del Gottardo), named after the Saint-Gotthard Massif, is the Swiss trans-alpine railway line from northern Switzerland to the canton of Ticino. The line forms a major part of an important international railway link between northern and southern Europe, especially on the Rotterdam-Basel-Genoa corridor. The Gotthard Railway Company (German: Gotthardbahn-Gesellschaft at Lucerne) was the former private railway company that financed the construction of and originally operated that line.
The railway comprises an international main line through Switzerland from Basel or Zürich to Immensee to Chiasso, together with branches, from Immensee to Lucerne and Rotkreuz, from Arth-Goldau to Zug or Pfäffikon SZ, and from Bellinzona to Chiasso via Locarno and Luino. At Chiasso, the line connects to the Milan–Chiasso railway, which runs across the Swiss–Italian border. The main line, the second-highest standard railway in Switzerland, penetrates the Alps using the Gotthard Tunnel at 1,151 metres (3,776 ft) above sea level. The line then descends as far as Bellinzona, at 241 metres (791 ft) above sea level, before climbing again to the pass of Monte Ceneri, on the way to Lugano and Chiasso. The extreme differences in altitude necessitate the use of long ramped approaches on each side, together with seven spirals.