Question: Which city is a Designit headquarters located in that is also the most populous city in the Nordic countries?

Context articles: Designit
List of urban areas in the Nordic countries
Nordic Innovation
Northern Europe
Scandinavia House – The Nordic Center in America
Scandinavian studies
Mall of Scandinavia
Stockholm
The Nordic Institute in Finland
University of Copenhagen

Designit (imperative mood, meaning 'design it' and pronounced 'dɪˈzʌɪn ɪt') is an international strategic design firm founded in Aarhus, Denmark, in 1991 by Anders Geert Jensen and Mikal Hallstrup.
 Designit headquarters is located in Copenhagen, Denmark, with offices in Aarhus, Berlin, Barcelona, Stockholm, Lima, Madrid, Medellín, Munich, Oslo, San Francisco, Tel Aviv, Tokyo and New York City.
This is a list of urban areas in the Nordic countries by population.
 The population is measured on a national level, independently by each statistical bureau.
 Statistics Sweden uses the term "tätort" (urban settlement), Statistics Finland uses also "tätort" in Swedish and "taajama" in Finnish, Statistics Denmark uses "byområde" (city), while Statistics Norway uses "tettsted" (urban settlement).
 The statistical definition is agreed upon in the Nordic countries: a continuous built-up area whose population is at least 200 inhabitants and where the maximum distance between residences is 200 metres; discounting roads, parking spaces, parks, sports grounds and cemeteries – without regard to the ward, municipal or county boundaries.
 This could be compared with "United States urban areas" in the United States.
Nordic Innovation is an institution that works to promote cross-border trade and innovation between the Nordic countries.
 Among the institution's goas are removng barriers and building relations through Nordic cooperation.
 Nordic Innovation works under the auspices of the Nordic Council of Ministers, and is located in Oslo.
 The institution is seen as a key player in implementing the Nordic trade, industry and innovation partnership programme.Nordic Innovation has an ambition to establish the Nordic countries as a world-leading region for innovation and sustainable growth.
 Nordic Innovation works with both private and public stakeholders, and has projects and partners in all the Nordic countries.
Northern Europe refers geographically to the northern part of Europe, or in a narrower sense, to the cultural grouping of the Nordic countries, Baltic countries, and sometimes also the British Isles.
 Greenland, which is geographically part of North America, forms one of the Nordic countries (and is politically part of the Kingdom of Denmark) and therefore may be included in Northern Europe by some definitions.
Scandinavia House – The Nordic Center in America is the American-Scandinavian Foundation's cultural center at 58 Park Avenue (between East 37th Street and East 38th Street), in Murray Hill, Manhattan, New York, dedicated to preserving the history of the Scandinavian and Nordic countries in the United States through a wide variety of exhibits and programming.
 This cultural center hosts exhibitions of fine art, design as well as performing arts pieces from Nordic countries.
 The center also introduces the local population and guests with Scandinavian languages and customs by organizing courses.
Scandinavian studies is an interdisciplinary academic field of area studies, mainly in the United States and Germany, that covers topics related to Scandinavia and the Nordic countries, including languages, literatures, histories, cultures and societies.
 The term Scandinavia mainly refers to Denmark, Norway and Sweden, although the term "Scandinavian" in an ethnic, cultural and linguistic sense also refers to the peoples and languages of the Faroe Islands and Iceland, and the Scandinavian-speaking (that is, Swedish-speaking) minority in Finland.
 Scandinavian studies does not exist as a separate field within Scandinavia or the Nordic countries themselves, as its scope would be considered far too broad to be treated meaningfully within a single discipline.
 The closest related field in Scandinavia would be the more narrow discipline of "Nordic linguistics", which covers North Germanic languages.
 A major focus of Scandinavian studies is the teaching of Scandinavian languages, especially the three large languages Danish, Norwegian and Swedish.
Mall of Scandinavia is a shopping mall located in Solna Municipality, Stockholm, Sweden.
 It was inaugurated on November 12, 2015, and is the second largest mall in the Nordic countries with 224 stores, many of them with double-height storefronts up to 8 m tall.
 50,000 shoppers showed up to the opening of the mall.
 About 20-25% of the leasable area is dedicated to experiences, including 22 restaurants and a 15 screen multiplex with the first purpose-built commercial IMAX theatre in the Nordic region.
 The shopping mall has 3,700 parking spaces and a retail gross leasable area of 101,048 m2 , making it the third largest shopping mall in the Nordic countries after Sello in Espoo, Finland, and Sørlandsenteret in Kristiansand, Norway.
 The building also house an additional 42,000 m2 of office space and condominiums.
Stockholm ( ; ] ] ) is the capital of Sweden and the most populous city in the Nordic countries; 942,370 people live in the municipality, approximately 1.5 million in the urban area, and 2.3 million in the metropolitan area.
 The city stretches across fourteen islands where Lake Mälaren flows into the Baltic Sea.
 Just outside the city and along the coast is the island chain of the Stockholm archipelago.
 The area has been settled since the Stone Age, in the 6th millennium BC, and was founded as a city in 1252 by Swedish statesman Birger Jarl.
 It is also the capital of Stockholm County.
The Nordic Institute in Finland (NIFIN) - is a Nordic cultural institute under the aegis of the Nordic Council of Ministers located in Helsinki.
 Nifin aims to provide people in Finland with knowledge about the other Nordic countries’ languages and cultures.
 The Institute also aims to spread knowledge about the Finnish language and culture to the other Nordic countries.
 In collaboration with the other Nordic Houses and Institutes, Nifin also coordinates cultural co-operation with the neighbours in the Baltic countries and North-West Russia.
The University of Copenhagen (UCPH) (Danish: "Københavns Universitet" ) is the oldest university and research institution in Denmark.
 Founded in 1479 as a studium generale, it is the second oldest institution for higher education in Scandinavia after Uppsala University (1477).
 The university has 23,473 undergraduate students, 17,398 postgraduate students, 2,968 doctoral students and over 9,000 employees.
 The university has four campuses located in and around Copenhagen, with the headquarters located in central Copenhagen.
 Most courses are taught in Danish; however, many courses are also offered in English and a few in German.
 The university has several thousands of foreign students, about half of whom come from Nordic countries.