The story
1860 (approximately) – Many different plans for a mountain railway on the Jungfrau exist, but fail due to financial problems.
1894 – The industrialist Adolf Guyer-Zeller receives a concession for a rack railway, which begins from the Kleine Scheidegg railway station of the Wengernalpbahn (WAB), with a long tunnel through the Eiger and Mönch up to the summit of the Jungfrau.
1896 – Construction begins. Construction work proceeds briskly.
1898 – The Jungfrau Railway opens as far as the Eigergletscher railway station, at the foot of the Eiger.
1899 – Six workers are killed in an explosion. There is a four-month strike by workers. Adolf Guyer-Zeller dies in Zürich on 3 April. The section from Eigergletscher station to Rotstock station opens on 2 August.
1903 – The section from Rotstock station to Eigerwand station opens on 28 June.
1905 – The section from Eigerwand station to Eismeer station opens on 25 July.
1908 – There is an explosion at Eigerwand station.
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1912 – On 21 February, sixteen years after work commenced, the tunneling crew finally breaks through the glacier in Jungfraujoch. Jungfraujoch station is inaugurated on 1 August.
1924 – "The house above the clouds" at Jungfraujoch is opened on 14 September.
1931 – The research station at the Jungfraujoch is opened.
1937 – The Sphinx Observatory is opened. A snowblower is purchased, resulting in year-round operation.
1942 – Company offices are relocated from Zürich to Interlaken.
1950 – The dome is installed on the Sphinx Observatory.
1951 – The adhesion section between Eismeer station and Jungfraujoch station is converted to rack operation.
1955 – A second depot at Kleine Scheidegg is constructed. The post office inaugurates its relay station on the Jungfraujoch.
1972 – The panoramic windows are installed at Eigerwand and Eismeer. The Jungfraujoch mountain house and tourist house are destroyed by fire on 21 October.
1975 – A new tourist house is opened.
1987 – A new mountain house is opened on 1 August.
1991 – A new station hall is opened at the Jungfraujoch.
1993 – The small Kleine Scheidegg depot is extended.
1996 – The covered observation deck at the Sphinx Observatory is opened.
1997 – The number of annual visitors exceeds 500,000 for the first time.
2000 – On 1 June, a daily record number of 8,148 visitors is achieved.
2016 – Eigerwand station is closed.
From Wikipedia’s article on Jungfraubahn Holding AG, shared under CC BY-SA 4.0.5
