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While there are early examples of international links between municipalities akin to what are known as sister cities or twin towns today dating back to the 9th century,[2] the modern concept was first established and adopted worldwide during World War II.[3][4]

Origins of the modern concept[edit]

Throughout history, many cities have participated in various cultural exchanges and similar activities that might resemble a sister-city or twin-city relationship, but the first officially documented case of such a relationship was a signed agreement between the leaders of the cities of Toledo, Ohio and Toledo, Spain in 1931.[5] However, the modern concept of town twinning really grew during the Second World War. More specifically, it was inspired by the bombing of Coventry on 14 November 1940, known as the Coventry Blitz.[3] First conceived by the then Mayor of Coventry, Alfred Robert Grindlay,[6] culminating in his renowned telegram to the people of Stalingrad (now Volgograd) in 1942,[7][8][9] the idea emerged as a way of establishing solidarity links between cities in allied countries that went through similar devastating events.[10]


The comradeship between the two cities continued, when again in response to the Battle of Stalingrad, 830 women in Coventry – led by the subsequent Mayor Emily Smith – had their names embroidered on a tablecloth along with the words "Little help is better than a lot of pity" and sent it, along with money (each donated six pence), to the people of Stalingrad.[11][4][12] The tablecloth can now be seen at the Panorama Museum of the Battle of Stalingrad.


The twinning between Coventry and Stalingrad was formalized in 1944 [13] and, after the end of the war, similar links were established to foster friendship and understanding among former foes as an act of peace and reconciliation,[2][14] with new twinnings between Coventry and German cities: Kiel as early as in 1947 and Dresden in 1956.[3] In 1957, Coventry was officially twinned with Belgrade, even though the link actually dates back to 1953 when then Yugoslav Ambassador visited Coventry and offered a gift of timber from his native country for use in the new Civic Theatre, which when finished was named Belgrade Theatre.[15]


The purpose of twinnings was then expanded to encourage trade and tourism[1] or to reflect other links, such as towns sharing the same name or migration links.[16] By the 2000s, town twinning became increasingly used to form strategic international business links among member cities,[17][18] and may include localities of any scope such as villages, prefectures, or countries.

Linguistic reasons[edit]

Relationships between communities can also arise because of shared names; they may be named after one community (as in the case of Córdoba), they may share names (as in the case of Santiago de Compostela), or their names may have a common etymology. These similarities usually arise from sharing the same or related language or having been a colony or previously conquered.

Political significance[edit]

The twinning of towns and cities is sometimes done for political purposes. The Hungarian city Gyöngyös was twinned with the Azerbaijani city of Shusha in 2013, signing the twinning agreement with representatives from the Azerbaijani government; Hungary recognised Shusha as de jure part of Azerbaijan, even though it was controlled at the time and until 2020 by the military forces of Armenia and the unrecognised Republic of Artsakh.[76] An attempt was made in 2003 by Preston city councillors in England to twin with the Palestinian town of Nablus in the name of solidarity.[77]


Turkey bans partnerships with any city in a country that recognizes the Armenian genocide. As a result, when Bulgaria recognized the genocide in 2016, some twin agreements such as EdirneHaskovo were terminated by Turkey.[78]


China manages sister city relationships through the Chinese People's Association for Friendship with Foreign Countries (CPAFCC). In April 2019, CPAFCC president Li Xiaolin said, “Friendship city relations have become one of the important channels to implement the Belt and Road Initiative.”[79] In January 2020, Shanghai canceled its sister city relationship with Prague after Prague's mayor signed a sister city relationship with Taipei.


In November 2020, U.S. senator Marsha Blackburn introduced legislation, the Sister City Transparency Act, to provide federal oversight to mitigate risks of sister city agreements being used for political influence campaigns.[80] In 2024, Indiana banned localities from entering into sister city agreements with six "foreign adversary" countries.[81]

In 2012, the city of suspended their sister city relationship with Nagoya after Nanjing Massacre denialist statements by Nagoya's mayor, Takashi Kawamura.[82]

Nanjing

In 2013, the Italian cities of , Venice, and Turin, formerly twinned with Saint Petersburg, suspended their links due to Russia's passage of anti-gay legislation.[83][84] Activists in California circulated petitions urging California cities and counties with relationships with Russian counterparts to take similar steps.[85]

Milan

In 2014, terminated its partnership with Saint Petersburg and Moscow because of the Russian military intervention in Ukraine. Moscow had been Prague's partner city since 1995.[86]

Prague

In 2017, the mayor of , Hirofumi Yoshimura, ended the city's 60-year relationship with San Francisco due to the erection of a memorial to comfort women in downtown San Francisco.[87][88] Similarly, the cities of Glendale, California, and Higashiōsaka, Japan, came close to terminating their twinning in 2013 and 2014 because of an ongoing dispute over Glendale's support for the erection of a statue dedicated to Korean comfort women in a city park.[89]

Osaka

In July 2020, the town council of , a Dutch city south of Utrecht, voted to end its friendship with Puławy in eastern Poland, citing "gay free zones" as the reason.[90]

Nieuwegein

In March 2022, the council voted unanimously to suspend its relationship with St Petersburg as a result of the on-going Russian invasion of Ukraine.[91]

City of Melbourne

In March 2022, cut ties[92] with their twin-town Ozyorsk due to the Russian invasion of Ukraine.[91]

Doncaster

On 22 March 2022, voted to temporarily pause the city's link with Volgograd (formerly Stalingrad) and explore twinning with Mariupol instead due to the Russian invasion of Ukraine.[93]

Coventry

In July 2022, the city of suspended its ties to Irkutsk due to the Russian invasion of Ukraine.[94]

Eugene, Oregon

In February 2023, the mayor of broke ties with twin city Tel Aviv citing Israeli "apartheid" as the reason.[95]

Barcelona

Louisville's twin towns

Louisville's twin towns

Insignia of twin towns on town hall in Kralupy nad Vltavou, Czech Republic

Insignia of twin towns on town hall in Kralupy nad Vltavou, Czech Republic

Plovdiv, Bulgaria, twin towns directions

Plovdiv, Bulgaria, twin towns directions

Twin town signs of Kemi, Finland

Twin town signs of Kemi, Finland

Twin town monument in Tawau, Sabah, Malaysia

Twin town monument in Tawau, Sabah, Malaysia

Artwork produced by Japanese and American citizens to celebrate the sister city relationship between Concord, and Kitakami

Artwork produced by Japanese and American citizens to celebrate the sister city relationship between Concord, and Kitakami

Holon, Israel, a twin towns garden

Holon, Israel, a twin towns garden

Welcome to Glastonbury, UK – Twin towns Lalibela, Ethiopia, and Patmos, Greece

Welcome to Glastonbury, UK – Twin towns Lalibela, Ethiopia, and Patmos, Greece

Kragujevac and Suresnes twinning agreement

Kragujevac and Suresnes twinning agreement

Zalaegerszeg, Hungary twinnings

Zalaegerszeg, Hungary twinnings

Council of Local Authorities for International Relations

Cross-border town naming

Douzelage

Global city

Lists of twin towns and sister cities

List of twin towns and sister cities in Europe

Paradiplomacy

Partnership2Gether

Sister Cities International

Twin cities

Town twinning in Europe's municipalities, towns and regions

Twinning in Europe

UK Town Twinning Portal

(PDF). Brussels: CEMR Council of European Municipalities and Regions. Archived from the original (PDF) on 13 May 2008. Retrieved 11 January 2010.

"Twinnings for Tomorrow's World – A Practical Handbook"