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 Havana City vs. Havana City Province 

The source of that confusion is that Havana City Province includes Havana and other cities like Marianao, Santiago de las Vegas, San Miguel del Padron, Regla, Guanabacoa and so on, with their own city halls, institutions, history, etc. Now, it is true that the history, the economy and the social lives of those cities have a strong bond with Havana. For example, Santiago de las Vegas grew because of the importance of the tobacco plantations, Havana had (and still has) tobacco factories. Havana was the most important port of the Spanish Empire in America, and the cities around also enriched because of that fact. Havana's growth swallowed all those cities around, and nowadays they seem to be one and only city, but this is only apparent. Even nowadays, when someone who lives in Marianao borough or district crosses the Almendares River, which is the border, he/she always says ""I'm going to Havana to shop"". Anyway, you can merge both articles, or write one article for Havana and do the same for the rest of the disctrics. By the way, the population of Havana City Province of 2.2 million people, are from the last census of 2002. In ten years, the population have grown, for sure.

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