Research into the Holocaust continues, to be reread and refined by the new generations. For Europeans to understand this shared past, the endeavour must not be confined to national borders. The European Holocaust Research Infrastructure (EHRI) was launched in 2010 to facilitate transnational research, commemoration and education and fight fragmentation by connecting sources, institutions and people. The goal of the EU-funded EHRI-3 project is to deepen the integration of Holocaust archives, developing protocols and tools that will unveil hidden sources for Holocaust research. Moreover, it will introduce new transnational approaches to the study of the Holocaust, demonstrating how a humanities research infrastructure can inform societal discourse in areas such as antisemitism, xenophobia and cultural tolerance.