This book analyzes the contribution of cultural policy and the creative sectors of contemporary cities from the most advanced theories and concepts of cultural and urban sociology. Specifically, the book focuses on the phenomenon of cultural clustering, the transformation of urban cultural institutions and the emergence of artistic neighborhoods, taking the city of Barcelona as the object of study and paradigmatic of this process. Barcelona reveals the great possibilities that culture has to transform a post-industrial city into a tourist and service center, highlighting the contribution of politics and cultural institutions in this transformative process The limits, unexpected effects, and resistances to these dynamics that mark a new stage of culture in the 21st century of today's metropolis, are also confronted. This is a timely review of the main theoretical-methodological debates of the cultural field, applied to an urban context considered as a "cultural city" and in constant urban revitalization.