Copenhagen, the capital of Denmark, boasts a population of around 660,000 within its municipality and 1.4 million in its urban expanse. Situated on the islands of Zealand and Amager, the city shares a border with Malmö, Sweden, across the Øresund strait. A notable infrastructure feat, the Øresund Bridge, links these two cities via rail and road networks.
By 1901, the population of Copenhagen grew to approximately 400,000 inhabitants.
The northern part of Amager and Valby were incorporated into the City of Copenhagen in 1901-02.
Frederiks Hospital, which began operating in March 1757, became state-owned in 1903 and was renamed Rigshospitalet.
Nordisk Film, the oldest continuously operating film production company in the world, was established in Valby, Copenhagen in 1906.
Det Ny Teater (the New Theatre) was completed in 1908.
The Gefion Fountain, designed by Anders Bundgaard and illustrating a Nordic legend, was completed in 1908 near the southeast corner of Kastellet.
Bispebjerg Hospital, serving approximately 400,000 people in the Greater Copenhagen area, was built in 1913.
Inspired by Hans Christian Andersen's fairy tale, the Little Mermaid statue was created by Edvard Eriksen and unveiled in 1913. It is located in the waterfront of Østerbro district.
Tivoli Gardens opened Rutschebanen, the world's oldest operating rollercoaster, in 1915.
Construction of the Politigården building, designed in a Neoclassical style by architects Hack Kampmann and Holger Alfred Jacobsen, commenced in 1918.
From 1920 to 1960, outlying areas such as Kongens Enghave, Valby, Vigerslev, Vanløse, Brønshøj, Utterslev, and Sundby were developed, primarily with residential housing and apartments.
The Politigården building, which houses the Danish National Police and Copenhagen Police headquarters, was completed in 1924.
Copenhagen Airport, Scandinavia's largest airport, opened in Kastrup on the island of Amager in 1925.
Gentofte Hospital opened in 1927.
Paul Gustav Fischer, a prolific painter who frequently depicted scenes of Copenhagen, died in 1934.
Copenhagen was occupied by German troops from 9 April 1940, marking the beginning of occupation during World War II.
Designed by P.V. Jensen Klint, the Expressionist-style Grundtvig's Church in Bispebjerg was completed in 1940, its west façade resembling a church organ.
Physicists Niels Bohr and Werner Heisenberg met in Copenhagen in 1941, an event later dramatized in Michael Frayn's play "Copenhagen".
In August 1943, the Danish government's collaboration with the Nazi occupation forces collapsed. The Royal Danish Navy sunk several ships in Copenhagen Harbor to prevent their use by the Germans, and the Nazis began arresting Jews.
The oldest operating ferris wheel began operation at Tivoli Gardens in 1943.
On March 22, 1945, the British Royal Air Force, in an operation known as "Operation Carthage," attacked the Sicherheitsdienst and Gestapo building in Copenhagen. While the attack successfully destroyed Gestapo archives, a plane crash led to the deaths of 123 civilians.
Copenhagen was liberated from German occupation on 4 May 1945.
On 8 May 1945, Copenhagen was officially liberated by British troops under the command of Field Marshal Bernard Montgomery.
In 1945, Ole Lippman, leader of the Danish section of the Special Operations Executive, invited the British Royal Air Force to assist in their operations against Nazi headquarters in Copenhagen. Air Vice-Marshal Sir Basil Embry planned a precision attack on the Sicherheitsdienst and Gestapo building.
An innovative urban development project known as the Finger Plan was introduced in 1947, aiming to create new housing and businesses interspersed with green areas.
Construction of the Radisson Blu Royal Hotel, designed by Arne Jacobsen for Scandinavian Airlines System (SAS), began in 1956.
Copenhagen first hosted the UCI Road World Championships in 1956.
By 1960, the development of outlying residential neighborhoods in Copenhagen, which began in 1920, was largely completed.
The Radisson Blu Royal Hotel was completed in 1960, becoming the tallest hotel in Denmark at the time.
Strøget, one of the world's oldest and longest pedestrian streets, was closed to traffic in 1964.
The Radisson Blu Royal Hotel, Copenhagen's only skyscraper until 1969, was surpassed in height by another building.
Hvidovre Hospital opened in 1970.
In September 1971, following student unrest, the former Bådsmandsstræde Barracks in Christianshavn was occupied, leading to the establishment of Freetown Christiania.
During student unrest in 1971, squatters occupied an area that became known as Freetown Christiania.
Motor traffic in Copenhagen grew significantly, leading to the replacement of trams with buses in 1972.
An oral literature conference, part of the 9th International Congress of Anthropological and Ethnological Sciences, was held in Copenhagen from August 15-18, 1973.
Herlev Hospital opened in 1976.
Copenhagen's annual marathon event, the Copenhagen Marathon, was established in 1980.
The annual Copenhagen Marathon was established in 1980.
"The Copenhagen Connection", a novel set in Copenhagen, was published in 1982.
Copenhagen Carnival, featuring music, dance, and festivities, debuted in 1982, becoming an annual tradition during the Whitsun Holiday.
Lois Lowry's "Number the Stars", a novel set in Copenhagen, was published in 1989.
The first photomarathon photography competition was held in Copenhagen in 1989, marking the beginning of an annual event.
Following a merger with Malmö harbour in 1990, the Copenhagen Port experienced a resurgence after decades of stagnation.
In 1992, FC København was formed as a merger between two older Copenhagen clubs, B 1903 and KB.
Peter Høeg's "Miss Smilla's Feeling for Snow", a novel set in Copenhagen, was published in 1992.
In 1992, Nordisk Film merged with the Egmont media group.
"Borderliners", a novel by Peter Høeg set in Copenhagen, was published in 1993.
Det Ny Teater reopened as a popular venue for musicals in 1994 after its closure.
Amager Hospital opened in 1997.
Michael Frayn's play "Copenhagen", about a meeting between physicists Niels Bohr and Werner Heisenberg in 1941, premiered in 1998.
Rose Tremain's "Music and Silence", a novel set in Copenhagen, was published in 1999.
The Black Diamond, an extension to the Royal Danish Library, was completed in 1999 on the Copenhagen waterfront.
The Øresund Bridge, connecting Zealand and Scania, opened in 2000, leading to increased commuting and a more integrated region.
David Ebershoff's "The Danish Girl", a novel set in Copenhagen, was published in 2000.
In the summer of 2000, the Øresund Bridge, connecting Copenhagen and Malmö in Sweden, opened to rail and road traffic.
A large offshore wind farm began operation at Middelgrunden, just off the coast of Copenhagen, in 2001, contributing about 4% of the city's energy.
"Sharpe's Prey" by Bernard Cornwell, a novel set in Copenhagen, was published in 2001.
The Copenhagen Metro, a railway system, began operations in 2002 and continued to expand until 2007.
The Copenhagen Metro, which serves central Copenhagen, launched in 2002.
The Copenhagen Opera House, a gift to the city from the A.P. Møller foundation, was completed and opened in 2004.
Among the world's most modern opera houses, the Copenhagen Opera House, designed by Henning Larsen, opened in 2005.
In 2005, Amager Strandpark, a 2 km long artificial island with 4.6 km of beaches, opened just a short distance from Copenhagen's city centre.
The Festival of Endless Gratitude (FOEG), celebrating indie counterculture, experimental pop music, and visual arts, first took place in Copenhagen in September 2006.
Between 2006 and 2011, Copenhagen experienced a 2.5% economic growth, contrasting with a 4% decline in the rest of Denmark.
DR, the major Danish public service broadcasting corporation, began consolidating its activities in a new headquarters, DR Byen, in 2006.
By 2007, the expansion of the Copenhagen Metro railway system, which began in 2002, was completed.
DR completed the consolidation of its activities in its new headquarters, DR Byen, in 2007.
The British design magazine Monocle named Copenhagen the World's best design city in 2008.
Designed by Jean Nouvel, the Copenhagen Concert Hall, one of the most expensive ever built, opened in January 2009, home to the Danish National Symphony Orchestra.
Copenhagen gained international attention in December 2009 when it hosted COP15, the worldwide climate meeting.
CPH:PIX, Copenhagen's international feature film festival, was established in 2009 through the merger of the NatFilm Festival and CIFF.
Copenhagen began to experience a boom in tourism, becoming one of the fastest-growing metropolitan destinations in Europe from 2009 onwards.
In 2009, the annual Round Christiansborg Open Water Swim Race, a 2-kilometer open water swimming competition, incorporated a 10-kilometer FINA World Cup competition.
Copenhell, a heavy metal rock music festival, held its first edition at the former B&W Shipyard in Refshaleøen in 2010.
Statistics from 2010 revealed that the majority of Copenhagen's 350,000 workers were employed in the service sector, particularly in transport, communications, trade, and finance.
Noma, a Copenhagen restaurant specializing in New Nordic Cuisine, earned the title of Best Restaurant in the World by Restaurant magazine in 2010.
City break tourism contributed an estimated DKK 2 billion in turnover in 2010, an exceptional year with a 29% increase.
Taking advantage of its bicycle-friendly infrastructure, Copenhagen hosted the 2011 UCI Road World Championships in September 2011. This marked the second time Denmark hosted the event, the first being in 1956.
Copenhagen's economic growth period, which started in 2006, ended in 2011.
Noma retained its title as Best Restaurant in the World in 2011, further fueling global interest in New Nordic Cuisine.
The Copenhagen Metro transported approximately 54 million passengers by 2011.
In 2012, Copenhagen Harbour handled 372 cruise ships and 840,000 passengers.
In 2012, approximately 36% of Copenhagen's working or studying population commuted by bicycle, covering a combined distance of 1.27 million kilometers every working day.
In 2012, Copenhagen Malmö Port (CMP) handled about 148,000 TEU and received approximately 8,000 ships.
For the third year running, Noma was crowned Best Restaurant in the World in 2012, cementing its place in the culinary world.
Despite high rankings for quality of living, Copenhagen ranked 39th for student friendliness in 2012 due to low scores in employer activity and affordability.
The Blue Planet, Denmark's national aquarium, opened in March 2013 in Kastrup. With 53 aquariums, it is the largest in Scandinavia.
Copenhagen Airport saw a record month in October 2013 with 2.2 million passengers.
Figures from November 2013 showed that passenger numbers at Copenhagen Airport were increasing by about 3% annually, significantly higher than the European average.
Copenhagen saw a 42% growth in international bed nights from 2009 to 2013, with the total number of bed nights in the Capital Region exceeding 9 million.
In 2013, Dansk Industri conducted a survey which showed that Copenhagen ranked first in educational qualifications and private company development but eighty-sixth in the employment climate from the perspective of local companies.
Monocle magazine named Copenhagen the "most liveable city" in 2013, citing its open spaces, pedestrian- and cyclist-friendly infrastructure, and emphasis on community and culture.
The Technical University of Denmark in Lyngby earned recognition as a leading technical university in Northern Europe in 2013.
The Grand Mosque of Copenhagen, Denmark's first mosque, opened in 2014, reflecting the increasing religious diversity in the city.
By 2014, Copenhagen boasted 15 Michelin-starred restaurants, solidifying its reputation as a gourmet destination in Scandinavia.
Copenhagen was ranked as the top green city for the second time in the 2014 Global Green Economy Index (GGEI) for its commitment to high environmental standards.
Copenhagen had a municipal policy aiming to provide all citizens with access to a park or beach within a 15-minute walk by 2015.
Copenhagen has consistently been ranked as one of the most bicycle-friendly cities in the world since 2015, with bicycles outnumbering its inhabitants.
In 2015, 680,000 cruise passengers visited the port of Copenhagen.
As of January 1, 2016, Statistics Denmark reported a population of 1,280,371 for the Copenhagen urban area, which includes the municipalities of Copenhagen and Frederiksberg, as well as parts of 16 other municipalities.
In December 2016, Statistics Denmark reported a combined population of 763,908 for the City of Copenhagen, which includes the Municipality of Copenhagen and the adjacent municipalities of Dragør, Frederiksberg, and Tårnby.
The University of Copenhagen, founded in 1479, was ranked 30th in the world by the Academic Ranking of World Universities in 2016.
In 2017, the Capital Region of Denmark, which includes Copenhagen, recorded a gross domestic product (GDP) of €120 billion, ranking it 15th highest in GDP per capita among European Union regions.
The Copenhagen Metro expanded significantly with the opening of the City Circle Line (M3) on September 29, 2019, connecting all inner boroughs of the city.
Copenhagen was ranked first among Lonely Planet's top ten cities to visit in 2019.
In 2019, 56.9% of Copenhagen's population were members of the Lutheran Church of Denmark, a slight decrease from the previous year.
The 2.2 km Nordhavn extension of the Harbour Line (M4) opened on March 28, 2020, running from Copenhagen Central Station to Østerport.
In 2020, Copenhagen mandated that new buildings be constructed according to near net-zero energy standards.
As of August 2021, the Øresund Region, encompassing parts of Denmark and Sweden, had a population of 4.1 million, with 2.7 million residing in the Danish part.
Copenhagen was shortlisted for the European Commission's 2022 European Capital of Smart Tourism award in October 2021.
On 3 July 2022, a shooting at Field's mall in Copenhagen resulted in the death of three people. Police arrested a 22-year-old man and have not ruled out terrorism as a motive.
Data on Copenhagen's population by origin background was collected in 2022.
The M4 Sydhavn branch is expected to open in 2024 as part of Copenhagen's strategy to promote sustainable transport.
Copenhagen aims to achieve carbon neutrality by 2025 through various initiatives such as reducing electricity and heat consumption, promoting renewable energy, and transitioning to carbon-neutral district heating.