Résumé : This master thesis aims at answering the following questions: what is the spatial distribution of open in Brussels and Copenhagen? How does this distribution relate with the socio-economic structure of these cities? What conclusions can we draw out of this relation in terms of political urban priorities? We used mapping and semi-structured interviews to help us conduct our comparative analysis. We found that if the two capital cities were subject to common trends i.e. the neoliberal governance of insecurity in the context of global city competition, the actual uptake of CCTV takes different forms and intensities in our two case studies and must be analysed in light of their local political economy.