Nowadays that the globally valid spatial model of a modern city, is derived from the rich tradition of the European city structure, the authenticity of preserved heritage of our continent may be a significant advantage in the global competition between metropolises. European cities, sometimes dating back several millennia ago, are still evolving, changing, modernizing. Despite wars and natural disasters, most of them managed to save the historic urban systems, or fragments of them, as well as architectural elements forming them (buildings and their complexes).Their primary functions as unsustainable, are replaced by others. Many of today’s hybrid cultural projects are formed on the basis of the historic structures, an element of the broader urban strategies, related to the protection of heritage and city promotion. Selected case studies which has been designed or built lately in one of Spanish metropolises would be presented within this paper.