This paper proposes an interpretation of the memorial configuration of the genocide against the Tutsi by analysing how certain churches - which in 1994 became sites of massacres - have been transformed into heritage sites. The study examines both the genocidal acts committed within these churches, the historical depth and construction of the fratricidal hatred that motivated them, and the complex ways in which their memory is articulated today. It draws on a multi-source methodology, including field observations of the sites; trial records from the International Criminal Tribunal for Rwanda, which allow for the reconstruction of concrete dynamics of violence; and documentation from the Plorabunt database concerning interactions between the Rwandan Episcopal Conference and the post-genocide government between 1996 and 1998, aimed at establishing a shared policy of memory and the heritagisation of genocide churches.