Do memorials commemorating the victims of past atrocities reduce hate crimes and far right voting? While much research is devoted to explaining the rise of far right parties and the surge of hate crimes, little is known how to effectively counter this development. We argue that memorials that commemorate the victims of past atrocities reduce hate crimes, far right attitudes and far right voting. By humanizing victims through conveying their personal stories and experiences, memorials challenge dehumanizing hateful narratives employed by far right parties. As individuals are exposed to personal stories and experiences of victims, they are likely to develop a more inclusive sense of shared humanity which leads to an expansion of the in-group perspective to encompass contemporary religious, ethnic and sexual minorities. Empirically, we will test our argument by relying on two different types of memorials. We examine the impact of "Stolpersteine" ("stumbling stones"), brass cobblestones placed in front of the last residences of Nazi regime victims, which provide brief biographical sketches of the persecuted. Using a new geocoded dataset on their locations and installation dates in Germany and the Netherlands, we employ a difference-in-differences design to estimate their effects on hate crimes, far-right voting, and attitudes. Additionally, we analyze the impact of more traditional and curated Holocaust memorials, such as monuments and museums, on these outcomes. Our findings offer crucial insights into strategies for countering far-right extremism and political violence.