This thesis explores how one secular international organization, the United Nations (UN), and one religious local organization, the Islamic Community in Bosnia and Herzegovina (ICBH), understand peace and prioritize peacebuilding in post-war Bosnia and Herzegovina. Against the backdrop of ongoing political fragmentation and contesting narratives, this study compares two seemingly contrasting actors operating within the same post-war context and their respective understandings of peace and strategies for promoting sustainable peace. The analysis applied a qualitative content analysis of publicly available primary data from both actors. A theory-based coding framework, drawing from concepts of positive, liberal, post-liberal, and religious peace, guides the analysis of the material. This thesis examines two dimensions, including understanding of peace and peacebuilding priorities. The results show that the UN broadly frames peace through institutional and legal mechanisms, underscoring the rule of law and human rights. The ICBH presents peace as a spiritual and moral commitment to coexistence and responsibility. This difference is also reflected in their peacebuilding strategies, where the UN focuses on governance and reform, while the ICBH emphasizes reconciliation, ethical leadership, and dialogue.