Question: What is the year of the event that occured first, the Drammen Line was built, or Oslo was founded?

The Norwegian railway network consists of 2552 km of electrified railway lines, constituting 62% of the Norwegian National Rail Administration's 4114 km of line.  The first three mainline systems to be electrified were private ore-hauling lines.  The Thamshavn Line opened in 1909, and remained in revenue use until 1973, after which it was converted to a heritage railway.  It is the world's oldest remaining alternating-current railway and the only narrow gauge railway in the country to have been electrified.  It was followed by Norsk Transport's Rjukan and Tinnoset Lines two years later, and Sydvaranger's Kirkenes–Bjørnevatn Line in 1922.  The Norwegian State Railways' (NSB) first electrification was parts of the Drammen Line in 1922 and the ore-hauling Ofoten Line in 1923, which connects to the Iron Ore Line in Sweden.  The use of El 1 locomotives on the Drammen Line proved a large cost-saver over steam locomotives, and NSB started electrifying other lines around Oslo; from 1927 to 1930, the remainder of the Drammen Line, and the continuation along the Randsfjorden and Sørlandet Lines to Kongsvinger were converted, along with the first section of the Trunk Line.  In 1935, the Hardanger Line became the first section of new NSB track to be electrified.  From 1936 to 1940, NSB electrified the Østfold Line as well as more of the Sørland Line and the Bratsberg Line, connecting all electric lines west of Oslo. <SEP> Oslo West Station (Norwegian: "Oslo Vestbanestasjon" ) or Oslo V, is a former railway station located in Vika in Oslo, Norway.  It was the terminus of the Drammen Line between 1872 and 1980, until the Oslo Tunnel opened.  The station remained in use until 1989, when all traffic was moved to the new Oslo Central Station.  Until its closure it was the main station for trains on the Sørland Line, the Drammen Line and the Vestfold Line.  There was no passenger rail connection to Oslo Ø, the eastern station that served the eastern lines and trains to Bergen.  The only connection was the Oslo Port Line that went partially through some of the most trafficked streets in Oslo. <SEP>  It constitutes both a county and a municipality.  Founded in the year 1040, and established as a "kaupstad" or trading place in 1048 by Harald Hardrada, the city was elevated to a bishopric in 1070 and a capital under Haakon V of Norway around 1300.  Personal unions with Denmark from 1397 to 1523 and again from 1536 to 1814 and with Sweden from 1814 to 1905 reduced its influence.  After being destroyed by a fire in 1624, during the reign of King Christian IV, the city was moved closer to Akershus Fortress and renamed Christiania in the king's honour.  It was established as a municipality ("formannskapsdistrikt") on 1 January 1838. Oslo ( , , ] ] ] ) is the capital and the most populous city in Norway.  Following a spelling reform, it was known as Kristiania from 1877 until 1925, in which year its original Norwegian name of Oslo was restored. <SEP>  It was originally part of the Drammen Line between Oslo and Drammen which was built in 1872.  In 1973, Lieråsen Tunnel was built to shorten the Drammen Line, and much of the old line was closed down. The Spikkestad Line (Norwegian: "Spikkestadbanen" ) is a 14 kilometre long railway line between Asker and Spikkestad in Norway.  The last train on the section between Spikkestad and Drammen ran 2 June 1973.  However, the stretch between Asker and Spikkestad was kept as a branch line for local commuter traffic.