Memory and identity are present themes in contemporary debates and studies, in many fields of knowledge, approached under different aspects and by diverse groups. The lack of references in the midst of the rapid and profound transformations that characterize our time makes it necessary to seek to understand the causes and consequences of these changes. In the religious field, this process the progressive loss of inherited identities characterizes this process, which has of its most perceptible issues related to the transmission of a collective memory. Based on this context, this work aims to research the catacombs in the city of Rome, especially between the 2nd and 4th centuries, as places of memory and identity for christianity, through a dialogue proposal with other fields of knowledge, which this theme is related. Through the records left in these cemeteries (iconographic and epigraphic) and other documents, we want to reaffirm its importance for the preservation of the memory and identity of christianity today. From the challenges arising from postmodernity, we intend that the reflection around these places of enormous historical relevance, can contribute, through their testimonies, to the debate on the theme and inspire pastoral options and actions in ecclesial communities.