In recent times, Eastern Europe has faced emerging heritage policy forms. Both European and international entities have explored heritage diplomacy’s benefits within the European Neighbourhood area. However, the concept of heritage securitization, highlighted by researchers, involves states and organizations framing cultural heritage as a security issue amidst conflicts. This phenomenon is notable in Central and Eastern Europe, where entities from Ukraine, Estonia, the Czech Republic, and Russia engage in security-based heritage disputes. This study aims to assess how the European Union and the United Nations, as heritage diplomacy participants, respond to challenges like state-driven securitization that affects shared histories and heritages. The project seeks to develop an analytical framework to enhance research in this field and aid these organizations in addressing such challenges, with a focus on case studies in Ukraine, Estonia, and the Czech Republic.