Working within the transversality of memory and memorialization, this dissertation proposes an engagement with materiality in order to explore memory as a fusion of bodies (human and nonhuman intermingling), places (fragile and provisional spatiotemporal configurations), and practices (actions always embedded in performances and translations), forming mnemonic assemblages (Freeman; Nienass; Daniell, 2016) in post-genocide Rwanda. As memorialization in Rwanda is deeply embedded in a particular type of matter – human remains –, we adopt a corporeal focus, looking into the entanglements between persons and things considering their blurriness. Going beyond practices of representation, we explore the movements of friction between a wide range of entities assembling (and disassembling) in memorials, stressing its unpredictable character and underlining their provisional spatiotemporal configurations. With this move, we hope to energize the landscape with other beyond the conception of matter and place as passive or stable and towards a more fluid transformation enacted in the encounter between these material-semiotic entities. Exploring affective encounters between bodies and places, we argue that it is only in this co-becoming that memorial places are enacted. Working under the rubric of new materialism, we suggest a bricolage of approaches, accounting for the political in a more co-operative-cum-experimental sensibility (Thrift, 2008) towards generative matter. Such effort enables us to remember and forget with and through other bodies, acknowledging the importance of things/matter and places in memorialization practices in Rwanda, and inviting to join the call for a theoretical and methodological engagement with the lived experience in International Relations. More specifically, this dissertation engages with movement and flux of places and matter through memorials sites as places of friction and through the circularity of the dead body. Trying to grasp different modes of memory gatherings, we offer two assemblages to explore these differences: carefully designed national-level memorial sites (Kigali, Murambi, and Bisesero) and a spontaneous place of memory – Nyabarongo River. The research on these heterogeneous spaces assembled as places of memory is based on fieldwork conducted in Rwanda in 2011 and 2014.