The archaeology of genocide, war crimes, and mass death has become a growing sub-discipline in recent decades, with the most attention given to the locations of National Socialist ‘terror and mass death’. Within genocide research, the porajmos, or genocide of Romani people, is not a well-known topic, especially in Slovenia. Contrary to popular belief, the mistreatment of Romani and violence against them was not inflicted only by the Nazis and their allies, but by pro-communist-orientated Slovenian partisans as well. Archaeological traces of three mass executions have provided us with evidence of serious and poignant crimes committed against the Romani ethnic minority. The remains might have a significant role in determining whether these crimes are a part of porajmos or not and represent a unique material testimony of crimes against the Romani population in the Slovenian and the wider European context.