Located close to some of the most important historical areas of Bergamo, the nineteenth-century section of the former Montelungo-Colleoni barracks is set up as a strategic context to merge the old built environment with the more modern settlements. The report relates the challenge undertaken by a project of urban regeneration based on a functional mixité of high social, cultural and economic value. This starting from the results of the International Competition promoted in order to find the right balance between conservation and transformative actions, in the belief that the process and project aspects can play a central role in providing innovative responses to the recurring critical issues that arise in the complex transformations and in identifying effective forms of dialogue between institutions and stakeholders.