Editing Oslo (section)

===1900–present===
The city and municipality used the name ''Kristiania'' until 1 January 1925 when the original name of ''Oslo'' [[Geographical renaming|was restored]].<ref>{{cite web |url=http://www.byarkivet.oslo.kommune.no/OBA/tobias/tobiasartikler/tob2001-1_01.htm |title=Oslo kommune byarkivet (Oslo City Archives) |publisher=Oslo Kommune |author=Bård Alsvik |access-date=23 September 2013 |archive-date=4 March 2012 |archive-url=https://web.archive.org/web/20120304212803/http://www.byarkivet.oslo.kommune.no/OBA/tobias/tobiasartikler/tob2001-1_01.htm |url-status=live}}</ref> This was because Norway became fully independent in 1905, and Norwegians argued that a name memorializing a Danish king ([[Christian IV of Denmark]]) was inappropriate as the name of the capital of their country.<ref>{{Cite news |url=https://www.nrk.no/ostlandssendingen/xl/da-oslo-ble-oslo-1.13150638 |title=Da Oslo ble Oslo |last=NRK |work=NRK |access-date=5 May 2018 |language=nb-NO |archive-date=23 March 2017 |archive-url=https://web.archive.org/web/20170323202849/https://www.nrk.no/ostlandssendingen/xl/da-oslo-ble-oslo-1.13150638 |url-status=live}}</ref>

The municipality developed new areas such as [[Ullevål Hageby|Ullevål garden city]] (1918–1926) and [[Torshov]] (1917–1925). [[Oslo City Hall|City Hall]] was constructed in the former slum area of [[Vika, Oslo|Vika]] from 1931 to 1950. In 1948, Oslo merged with [[Aker, Norway|Aker]], a municipality which surrounded the capital and was 27 times larger, thus creating the modern, vastly enlarged Oslo municipality. At the time, Aker was a mostly affluent, green suburban community, and the merger was unpopular in Aker.<ref>{{cite web |url=https://www.dagsavisen.no/oslo/kommunen-som-ble-slukt-av-oslo-1.1080868 |title=Da Høyre kjempet mot kommunesammenslåing |website=www.dagsavisen.no |date=8 January 2018 |access-date=4 January 2020 |archive-date=4 January 2020 |archive-url=https://web.archive.org/web/20200104012534/https://www.dagsavisen.no/oslo/kommunen-som-ble-slukt-av-oslo-1.1080868 |url-status=live}}</ref>  Other suburbs, such as [[Lambertseter]], began to be developed in the 1950s. [[Aker Brygge]] was constructed on the site of the former [[shipyard]], [[Aker ASA|Akers Mekaniske Verksted]], from 1982 to 1998.

Norway was [[Operation Weserübung|invaded by Germany]] on 9 April 1940. Efforts to stop the invasion, most notably the [[Battle of Drøbak Sound|sinking of the ''Blücher'']], delayed the occupation of Oslo for several hours which allowed [[Haakon VII of Norway|King Haakon]] to escape the city. Oslo remained occupied throughout the war until Germany capitulated in 1945. During this time, the occupying troops were harried by saboteurs in acts of resistance. On 31 December 1944, allied bombers missed their intended target and hit a tram, resulting in 79 civilian deaths.<ref>{{Cite web |url=https://www.aftenposten.no/oslo/i/w00o/hele-familien-ble-drept-av-britiske-bomber-paa-nyttaarsaften-anne-lise-juuls-far-erik-18-overlevde |title=Hele familien ble drept av britiske bomber på nyttårsaften. Anne-Lise Juuls far Erik (18) overlevde. |date=31 December 2014 |access-date=8 October 2022 |archive-date=8 October 2022 |archive-url=https://web.archive.org/web/20221008235033/https://www.aftenposten.no/oslo/i/w00o/hele-familien-ble-drept-av-britiske-bomber-paa-nyttaarsaften-anne-lise-juuls-far-erik-18-overlevde |url-status=live }}</ref>

During the [[2011 Norway attacks]], Oslo was hit by a bomb blast that ripped through the [[Regjeringskvartalet|Government Quarter]], damaging several buildings including the building that houses the [[Office of the Prime Minister (Norway)|Office of the Prime Minister]]. Eight people died in the bomb attack.

On 25 June 2022, two people were killed and 21 others injured in [[2022 Oslo shooting|a mass shooting]]. An Iranian-born Norwegian citizen was subsequently charged with "aggravated terrorism".<ref name="BBC News-2022">{{Cite news |date=25 June 2022 |title=Oslo shooting: Norway attack being treated as Islamist terrorism, police say |language=en-GB |work=BBC News |url=https://www.bbc.com/news/world-europe-61933817 |access-date=25 June 2022 |archive-date=25 June 2022 |archive-url=https://web.archive.org/web/20220625164715/https://www.bbc.com/news/world-europe-61933817 |url-status=live }}</ref><ref>{{Cite news |date=10 November 2023 |first=Jan |last=Olsen |title=Iranian-born Norwegian man is charged over deadly Oslo Pride attack in 2022 |language=en-GB |work=Associated Press |url=https://apnews.com/article/norway-terror-radical-islamist-oslo-pride-attack-21cf3dcb4fcad4c24e2e5d0ec7c640ff |access-date=22 February 2024 |archive-date=22 February 2024 |archive-url=https://web.archive.org/web/20240222070527/https://apnews.com/article/norway-terror-radical-islamist-oslo-pride-attack-21cf3dcb4fcad4c24e2e5d0ec7c640ff |url-status=live }}</ref>

The city has continued to expand. For a few years, new large scale housing areas and infrastructure projects are being built and planned across the city, notably in [[Hasle, Oslo|Hasle]],<ref>{{Cite web |last=Årdal |first=Tore |date=2021-10-01 |title=Haslelinje - Gigantutbyggingen gjennomført i løpet av ti år |url=https://www.estatenyheter.no/magasin/haslelinje---gigantutbyggingen-gjennomfort-i-lopet-av-ti-ar/309716 |access-date=2024-04-06 |website=www.estatenyheter.no |language=nb-NO |archive-date=6 April 2024 |archive-url=https://web.archive.org/web/20240406234611/https://www.estatenyheter.no/magasin/haslelinje---gigantutbyggingen-gjennomfort-i-lopet-av-ti-ar/309716 |url-status=live }}</ref> [[Helsfyr]],<ref>{{Cite web |date=2023-11-15 |title=Store planer for områdene: Dette bygges på Bryn og Helsfyr nå |url=https://eiendomswatch.no/nyheter/kontor/article16601529.ece |access-date=2024-04-06 |website=eiendomswatch.no |archive-date=6 April 2024 |archive-url=https://web.archive.org/web/20240406234612/https://eiendomswatch.no/nyheter/kontor/article16601529.ece |url-status=live }}</ref>[[Bjørvika]],<ref>{{Cite web |date=2017-02-13 |title=Bjørvika - Fjordbyen |url=https://www.oslo.kommune.no/slik-bygger-vi-oslo/fjordbyen/bjorvika/ |access-date=2024-04-06 |website=Oslo kommune |language=no |archive-date=26 February 2024 |archive-url=https://web.archive.org/web/20240226035007/https://www.oslo.kommune.no/slik-bygger-vi-oslo/fjordbyen/bjorvika/ |url-status=live }}</ref> [[Nydalen]]<ref>{{Cite web |date=2023-01-14 |title=Det er Nydalens siste ubebygde tomt. Kravene om park er blitt hørt, men blir den stor nok? |url=https://www.aftenposten.no/oslo/i/69B9jr/slik-planlegges-den-siste-store-utbyggingen-i-nydalen |access-date=2024-04-06 |website=www.aftenposten.no |language=nb |archive-date=6 April 2024 |archive-url=https://web.archive.org/web/20240406234610/https://www.aftenposten.no/oslo/i/69B9jr/slik-planlegges-den-siste-store-utbyggingen-i-nydalen |url-status=live }}</ref> and [[Sinsen]], this is increasing the density in and around [[Ring 2 (Oslo)|Ring 2]] and [[Ring 3 (Oslo)|Ring 3]]. The [[Fornebu Line|Fornebu line]] on the metro is under construction as of 2024, and further subway lines crossing the inner city are being planned.<ref>{{Cite web |date=2017-09-27 |title=Fornebubanen - Slik bygger vi Oslo |url=https://www.oslo.kommune.no/slik-bygger-vi-oslo/fornebubanen/ |access-date=2024-04-06 |website=Oslo kommune |language=no |archive-date=26 June 2022 |archive-url=https://web.archive.org/web/20220626185225/https://www.oslo.kommune.no/slik-bygger-vi-oslo/fornebubanen/ |url-status=live }}</ref>