Heritage has always played a significant role in international relations, exemplified by gift exchanges among monarchs and debates over cultural ownership and repatriation post-conflict. Today, heritage serves as a medium for mediation and collaboration on the international stage, increasingly used by nation-states to further their cooperation agendas. Within ILUCIDARE, this concept is referred to as heritage-led international relations, distinct from heritage diplomacy. This approach includes a working definition of heritage-led international relations, an exploration of heritage’s role in diplomacy, and both theoretical and practical insights on heritage in EU international relations. Additionally, ILUCIDARE’s portfolio showcases their training activities across Europe, the Western Balkans, North and Sub-Saharan Africa, the Middle East, and Latin America.