What is Dortmund?
{{Use dmy dates|date=January 2018}} {{Infobox German location |name = Dortmund |type = City |image_photo={{Photomontage|position=center | photo1a = | photo2a = Dortmund - Schloßstraße - Haus Bodelschwingh 08 ies.jpg | photo2b = Dortmund Oper Kaufmann.jpg | photo3a = Union-Brauerei Dortmund.jpg | photo3b = NRW, Dortmund, Friedensplatz - Altes Stadthaus 04.jpg | photo4a = Zeche Zollern Dortmund-Bövinghausen.jpg | photo4b = Alte Markt Dortmund.JPG | spacing = 2 | color = #TTTTTT | border = 0 | foot_montage = {{nobreak|From top: Skyline of the city, Lake Phoenix}}<br>Bodelschwingh Castle,<br>[[Theater Dortmund|Opera House]],<br> [[Altes Stadthaus, Dortmund|Altes Stadthaus]]<br>[[Dortmund U-Tower|Dortmunder]] <br>City centre with [[St. Reinold's Church, Dortmund|St Reinold's Church]],<br> [[Zollern II/IV Colliery]] }} |image_coa = Coat of arms of Dortmund.svg |image_flag = Flag of Dortmund.svg |coordinates = {{coord|51|31|N|7|28|E|format=dms|display=inline,title}} |image_plan = North rhine w DO.svg |plantext = |state = North Rhine-Westphalia |region = Arnsberg |district = Urban district |elevation = 86 |area = 280.71 <!-- |area_urban = 4,435 unknown parameter area_urban --> |pop_urban = 5302179 ([[Ruhr]]) |area_metro = 7,268 |pop_metro = 11300000 ([[Rhine-Ruhr]]) |population = 588250 |Stand = 2019-12-31<ref>{{cite web | url=https://www.radio912.de/artikel/immer-mehr-einwohner-in-dortmund-527729.html | title=Immer mehr Einwohner in Dortmund }}</ref> |pop_ref = |postal_code = 44001-44388 |area_code = 0231, 02304 |licence = DO |Gemeindeschlüssel = 05 9 13 000 |divisions = |website = {{URL|https://www.dortmund.de/}} |mayor = [[Thomas Westphal]] |Bürgermeistertitel = Lord Mayor |party = SPD |ruling_party1 = |ruling_party2 = |ruling_par