Bixiga is currently experiencing a critical situation that threatens the preservation of what constitutes its most unmistakable cultural and environmental heritage, associated with the strong impact caused by the advance of real estate interests, announced by new buildings recently approved by Conpresp in its territory. Particular concern is the vulnerability to which the area known as Grota do Bixiga is being exposed, despite the existence of protective legislation agreed since the early 2000s. Concern is intensified by the fact that these developments create reckless precedents for others to be approved in the near future, thus putting an end to the possibility of preserving what remains of Grota do Bixiga. This approach allows us to look at a whole process of study, inventorying and consolidation of knowledge produced within the Historical Heritage Department, which began in the 1980s, linking architectural assets to the structuring elements of the urban fabric and to the social relationships that not only populate the memory of the place, but are kept alive in the cultural practices of the present. It also allows us to deal with the impasses between cultural heritage preservation policies and urban policies of a broader nature. It also allows us to deal with the impasses between cultural heritage preservation policies and broader urban policies. Finally, it allows us to analyze another layer of latent memory, unveiled by the discoveries linked to the excavations carried out for the construction of the Orange Line Subway Station. The recent archaeological finds have sparked an important debate about the origin of occupation of the neighborhood associated with the presence of the Quilombo Saracura, strengthening the memory of the black population, due to its representativeness and its persistence over time, as an essential element of the culture of the place, which cannot be erased or made invisible.