A sister city or a twin town relationship is a form of legal or social agreement between two geographically and politically distinct localities for the purpose of promoting cultural and commercial ties. While there are early examples of international links between municipalities akin to what are known as sister cities dating back to the 9th century, the modern concept was established and adopted worldwide during World War II.
Origins of the modern concept 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, United States, and Toledo, Spain, in 1931. However, the modern concept of town twinning appeared during the Second World War. More specifically, it was inspired by the bombing of Coventry on 14 November 1940, known as the Coventry Blitz. Conceived by the then Mayor of Coventry, Alfred Robert Grindlay, culminating in a telegram to the people of Stalingrad (now Volgograd) in 1942, the idea emerged as a way of establishing solidarity links between cities in allied countries that went through similar devastating events.
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. The tablecloth can be seen at the Panorama Museum of the Battle of Stalingrad. The twinning between Coventry and Stalingrad was formalized in 1944 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, with new twinnings between Coventry and German cities: Kiel as early as in 1947 and Dresden in 1956. 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. The purpose of twinnings was then expanded to encourage trade and tourism. or to reflect other links, such as towns sharing the same name or migration links. By the 2000s, town twinning may include localities of any scope such as villages, prefectures, or countries, and became increasingly used to form strategic international business links among member cities.
Terminology
In the United Kingdom, the term "twin towns" is most commonly used; the term "sister cities" is generally used for agreements with towns and cities in the Americas. In mainland Europe, the most commonly used terms are "twin towns", "partnership towns", "partner towns", and "friendship towns". The European Commission uses the term "twinned towns" and refers to the process as "town twinning". Spain uses the term "ciudades hermanadas", which means "sister cities". Germany, Poland, and the Czech Republic each use (German), (Polish) and (Czech), which translate as "partner town" or "partner city". France uses (jumelage, twinned town or city), and Italy has (twinning) and (twinned municipality). In the Netherlands, the term is , or ("city bond" when providing mutual support). In Greece, the word (fraternisation) has been adopted. In Iceland, the terms (friend towns) and (friend cities) are used. In the former Soviet Bloc, "twin towns" and "twin cities" were used; in Russian, they use (sworn brother cities).
The Americas, South Asia, and Australasia use the term "sister cities" or "twin cities". In China, the term is 友好城市 (yǒuhǎo chéngshìfriendly cities). Sometimes, other government bodies enter into a twinning relationship, such as the agreement between the provinces of Hainan in China and Jeju in South Korea. The Douzelage is a town twinning association with one town from each of the member states of the European Union. Although the term is often used interchangeably with the term "friendship city", this may mean a relationship with a more limited scope in comparison to a sister city relationship, and friendship city relationships are mayor-to-mayor agreements.
City diplomacy
City diplomacy is a form of paradiplomacy that involves discussions between officials and residents of different cities. Often these cities will be located in different countries. As such, city diplomacy involves a sort of international relations that works in parallel to the conventional system involving embassies, ambassadors, and treaties negotiated at the level of nation states. According to Rodrigo Tavares, the earliest formal attempts to establish city diplomacy across national boundaries took place in the 19th century. Only a handful of cities were involved in the 19th-century efforts; it was not until the turn of the millennium that it became much more common. The first priority of those carrying out city diplomacy typically overlaps with the core aims of municipal government – improving the lives of local residents. Yet they will often collaborate with peers in other cities to work on issues of planet-wide concern, such as efforts to address climate change.
The phrase "city diplomacy" is formally used in the workings of the United Cities and Local Governments and the C40 Cities Climate Leadership Group, and is recognised by the USC Center on Public Diplomacy. A March 2014 debate in the British House of Lords acknowledged the evolution of town twinning into city diplomacy, particularly in matters of trade and tourism, but also in culture and post-conflict reconciliation. The importance of cities developing "their own foreign economic policies on trade, foreign investment, tourism and attracting foreign talent" has also been highlighted by the World Economic Forum. In addition to C40, other organisations facilitating city diplomacy include the World Cities Summit, City Mayors Foundation, the Smart City Expo World Congress, the Strong City Network and 100 Resilient Cities. As of 2016, there were over 125 such multilateral networks and forums to facilitate international collaboration between different municipal authorities. A Bill introduced in the 2019 session of the US Congress would have legislated for a City and State Diplomacy Act to create a new Office of Subnational Diplomacy at the Department of State ( H.R.3571 - City and State Diplomacy Act]). In the 2020s, the field of city diplomacy has taken a step beyond city-to-city exchanges to target the facilitation of dialogue between cities and multilateral organs, such as the United Nations.
Twinning beyond cities and towns Not only cities and towns, but also provinces, states, territories, and regions enter into twinning agreements. For example, the Canadian province of Alberta has "sister province" agreements with Gangwon, South Korea (since 1974), Hokkaido, Japan (since 1980), Heilongjiang, China (1981), Jalisco, Mexico (1999), Ivano-Frankivsk, Ukraine (2004), Lviv, Ukraine (2005), Guangdong, China (2017), and California, United States (2018), as well as policy-oriented (as opposed to economic and cultural) agreements with Nevada, United States (since 2013), Missouri, United States (2015), and Texas, United States (2018). The province of Punjab in Pakistan and California are another such pair, having signed a "sister province" agreement in 2023 for the promotion of economic and cultural relations.
By continent Europe The earliest known town twinning in Europe was between Paderborn, Germany, and Le Mans, France, in 836. Starting in 1905, Keighley in West Yorkshire, England, had a twinning arrangement with French communities Suresnes and Puteaux. The first recorded modern twinning agreement was between Keighley and Poix-du-Nord in Nord, France, in 1920 following the end of the World War I. This was initially referred to as an adoption of the French town; formal twinning charters were not exchanged until 1986.
The practice was continued after the Second World War as a way to promote mutual understanding and cross-border projects of mutual benefit. For example, Coventry twinned with Stalingrad and later with Dresden as an act of peace and reconciliation, all three cities having been heavily bombed during the war. The city of Bath formed an "Alkmaar Adoption committee" in March 1945, when the Dutch city was still occupied by the German Army in the final months of the war, and children from each city took part in exchanges in 1945 and 1946. Similarly, in 1947, Bristol Corporation (later Bristol City Council) sent five "leading citizens" on a goodwill mission to Hanover. Reading in 1947 was the first British town to form links with a former "enemy" city – Düsseldorf, a link that still exists. Since 9 April 1956 Rome and Paris have been exclusively and reciprocally twinned with each other, following the motto: "Only Paris is worthy of Rome; only Rome is worthy of Paris."
Within Europe, town twinning is supported by the European Union. The support scheme was established in 1989. In 2003 an annual budget of about was allocated to about 1,300 projects. The Council of European Municipalities and Regions also works closely with the commission (DG Education and Culture) to promote modern, high quality twinning initiatives and exchanges that involve all sections of the community. It has launched a website dedicated to town twinning. As of 1995, the European Union had more than 7,000 bilateral relationships involving almost 10,000 European municipalities, primarily French (2837 twinnings) and German (2485 twinnings).
Public art has been used to celebrate twin town links, for instance in the form of seven mural paintings in the centre of the town of Sutton, Greater London. The five main paintings show a number of the main features of the London Borough of Sutton and its four twin towns, along with the heraldic shield of each above the other images. Each painting also features a plant as a visual representation of its town's environmental awareness. In the case of Sutton this is in a separate smaller painting (above its main one) showing a beech tree, intended as a symbol of prosperity and from which Carshalton Beeches in the borough derives its name. Another example of the use of public art is the wall sculpture of the partner cities of Munich, Germany.
A recent study has concluded that geographical distance has very little, if any, influence upon communities' selections of a twin town. Twinned towns are often chosen because of similarities between them; thus about 15 towns in Wales are twinned with towns in Brittany, and Oxford is with Bonn, Leiden, Grenoble and other university cities. In Italy, sets of twins are Rovigo with Viernheim, Bedford and Tulcea. Many former West German cities are twinned with former East German cities; these twinning links were established before the fall of the Iron Curtain. Famous examples are the partnerships of Hanover and Leipzig, both of which have important trade fair grounds, or between Hamburg and Dresden. The first US-German town twinning was in 1947 between Worthington, Minnesota and Crailsheim. St Petersburg in Russia holds the record for the largest number of partnership arrangements with other communities. In June 2012, the Scottish village of Dull and the US town of Boring, Oregon, agreed to twin their municipalities to promote tourism in both places, playing on their names.