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City centres are spaces where different economic and cultural values converge as a consequence of their current uses and functions. In the case of Porto (Portugal), more than 20 years after being declared a World Heritage Site by UNESCO (in 1996), tourism has had remarkable effects on its physical, social and economic features. Therefore, Porto—and in particular its city centre—is taken in this article as the object of study. The interest of this space lies in the fact that it has been rapidlydoi:10.3390/su11205701 fatcat:4meooqp7ufazvox7fpvrxws4je