Editing Dortmund (section)

===Postwar period===
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Post-war, most of the historic buildings in the city centre were not restored, and large parts of the inner city area were completely rebuilt in the style of the 1950s.<ref>{{cite web | url=https://historischer-verein-dortmund.de/2020/03/03/1945-1958-die-stadt-im-wiederaufbau/ | title=1945 – 1958: Die Stadt im Wiederaufbau – Historischer Verein }}</ref> A few historic buildings such as the main churches [[Reinoldikirche]] and [[Marienkirche, Dortmund|Marienkirche]] were restored or rebuilt, and extensive parks and gardens were laid out. The simple but successful postwar rebuilding has resulted in a very mixed and unique inner cityscape. Today nearly 30 % of the city consists of buildings from before World War II.<ref name="Zensus 2011" /> Dortmund was in the British zone of occupation of Germany, and became part of the new state (Land) of [[North Rhine-Westphalia]] in 1946. The [[Zollern II/IV Colliery|LWL-Industriemuseum]] was founded in 1969.<ref>{{cite web |url=http://www.lwl.org/industriemuseum/standorte/zeche-zollern/english |title=The Zollern Colliery|publisher=LWL Industrial Museum|access-date=24 April 2017}}</ref> In 1987 the pit Minister Stein closed, marking the end of more than 150 years of coal mining. Dortmund{{sfn|Hennings|1990}} has since adapted, with its century-long steel and coal industries having been replaced by high-technology areas, including [[biomedical technology]], [[micro systems technology]], and [[Service (economics)|services]]. This has led Dortmund to become a regional centre for hi-tech industry.

In 2001 a new era began for the district [[Hörde]] in Dortmund, 160 years of industrial history ended with the beginning of the Phoenix See. The development of the Phoenix See area was carried out by a subsidiary of the Stadtwerke AG. In 2005 the first cornerstone was laid on the Phoenix area. The work started with full speed to manage the work with over 2.5 million meters of ground motion and 420.000 cubic meters of ferroconcrete. On 1 October 2010, the largest and most highly anticipated milestone could be celebrated: the launch of the flooding of the Phoenix See. Since 9 May 2011, the fences disappeared and the Phoenix See has been completed.<ref>{{cite web |url=https://www.dortmund.de/en/leisure_and_culture/phoenix_see_1/index.html|title= Lake Phoenix|publisher=Stadt Dortmund|access-date=24 April 2017}}</ref> In 2009, Dortmund was classified as a ''Node city'' in the Innovation Cities Index published by 2thinknow<ref name="innovation-cities.com"/> and is the most sustainable city in [[Germany]].<ref name="www.nachhaltigkeitspreis.de"/>

On 3 November 2013, more than 20,000 people were evacuated after a [[Blockbuster bomb|4,000-pound bomb]] from [[World War II]] was found. German authorities safely defused the bomb. The bomb was found after analysing old [[Aerial photography|aerial photograph]]s while searching for unexploded bombs dropped by [[Allies of World War II|Allied]] aircraft over Germany's industrial [[Ruhr]] region.<ref>{{cite web|title=4,000-pound, World War II bomb forces mass evacuation in Germany|url=https://www.cbsnews.com/news/4000-pound-world-war-ii-bomb-forces-mass-evacuation-in-germany/|work=[[CBS News]]|date=3 November 2013 |access-date=3 November 2013}}</ref>