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Terrassa is a medium-sized city in the province of Barcelona (Spain). As of January of 2017, it had a population of 217,000. It is an ancient Roman city, and was once the production centre for the region's textile industry.

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The neighbourhood of "El Gancho" is located in the heart of Zaragoza, a city with over 680,000 inhabitants, and in the centre of the Old Town (the 2nd largest in Spain). It emerged 800 years ago when the Market moved outside the Roman city.

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With a population of 1,071,000, and located in the city of Abidjan, Yopougon is a lively cultural centre where youth, artists, cultural entrepreneurs, and non-profit organisations, all play an essential role.

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With a surface area of 152.11km2, the commune is home to more than one million, five hundred thousand inhabitants, of which 50% are women and 56% are under 20 years old.

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Yakutsk is an administrative and political, economic, cultural and scientific center, the capital of the Sakha Republic (Yakutia). Most populous city in the northeast of Russia, a major cultural and scientific center.

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Wuhan is a central city in Central China, the capital of Hubei Province and a nationally recognized city of culture due to its 3,500 years of history and civilization.

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In less than 20 years, a small city in Canada's Vaudreuil-Dorian province of Quebec, has seen a significant transformation in its demographic; the number of citizens has risen from 17,000 to 37,000.

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Located in Canada, in the outskirts of Montreal, Vaudreuil-Dorion has a population of 37,000 citizens. The community began to undergo a significant transformation. Listed below are some of the changes from 1994 to 2014 (Statistics Canada):

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Val-de-Marne is located in the "inner" suburbs to the southeast of Paris, with a population of 1.35 million and an area of 250 square kilometres.