“Sites of Violence and their Communities” presents the results of a research project that brought together scholars and practitioners of memory work in an attempt to critically reinterpret the links between sites, their (human, and non-human) users, and memory. These interdisciplinary discussions focused on overlooked, repressed or ignored sites of violence that may benefit from new approaches to memory studies, approaches that go beyond the traditional focus on communication, symbolism, representation and communality. Clandestine or contested sites, in particular, pose challenging questions about memory practices and policies: about the status of unacknowledged victims and those who witnessed their deaths; about those who have inherited the position of “bystander”; about the ontology of human remains; and about the ontologies of the sites themselves, with the natural and communal environments implicated in their perdurance. Claude Lanzmann – one of the first to undertake rigorous research on abandoned, uncommemorated or clandestine sites of violence – responded to Pierre Nora’s seminal conception with his work and with the critical notion of “non-lieux de mémoire.” Methodologies emerging from more traditional as well as recently introduced perspectives (like forensic, ecological, and material ones) allowed team members to engage with such “non-sites of memory” from new angles. The goal was to consider the needs and interests of post-conflict societies; to identify and critically read unofficial transmissions of memory; and to re-locate memory in new contexts – in the grassroots of social, political and institutional processes where the human, post-human and natural merge with unanticipated mnemonic dynamics.