The Arolsen Archives are the international center on Nazi persecution with the world’s most comprehensive archive on the victims and survivors of National Socialism. The collection has information on about 17.5 million people and belongs to the UNESCO’s Memory of the World. It contains documents on the various victim groups targeted by the Nazi regime and is an important source of knowledge, especially for younger generations. To this day, the Arolsen Archives answer inquiries about some 20,000 victims of Nazi persecution every year. For decades, clarifying fates and searching for missing persons were the central tasks of the institution, which was founded by the Allies in 1948 as the “International Tracing Service”. Research and education are more important than ever to inform today’s society about the Holocaust, concentration camps, forced labor and the consequences of Nazi crimes. The Arolsen Archives are building up a comprehensive online archive so that people all over the world can access the documents and obtain information.