“Holocaust heritage” describes a wide spectrum of sites related to the crimes of the Nazis and their collaborators. Taking a holistic approach to this definition, including that which is both above and below ground, this entry considers three main themes that concern this class of heritage today. The first theme looks at issues to do with “authenticity,” and what is meant by this term. The second theme, Holocaust archaeology, examines recent examples of archaeological fieldwork and techniques that archaeologists employ to find evidence of Nazi crimes and the daily lives and deaths of prisoners. Finally, this entry considers the impact of climate change on both sites and their archaeological record, and what this means for the future of Holocaust heritage.