This course provides a comprehensive overview of public international law with a focus on Bangladesh's perspective and involvement in the international legal system. Students will study the sources of international law, including treaties, customary international law, and general principles of law. The course covers key areas of public international law such as state responsibility, diplomatic relations, and the law of the sea, with particular emphasis on how these areas affect Bangladesh. Participants will examine Bangladesh's participation in international organizations, including the United Nations and regional bodies like SAARC (South Asian Association for Regional Cooperation). The course also addresses international dispute resolution mechanisms and Bangladesh's experience with international courts and tribunals, including the landmark maritime boundary delimitation cases with Myanmar (2012) and India (2014) at the International Tribunal for the Law of the Sea. Students will analyze other significant cases involving Bangladesh in international law, such as the Rohingya genocide case at the International Court of Justice. The course will cover current international legal issues relevant to Bangladesh, including climate change and its impact on low-lying coastal areas, human rights concerns, and international trade law in the context of Bangladesh's developing economy. Special attention will be given to Bangladesh's obligations under various international treaties and conventions, and how these are implemented in domestic law. By the end of the course, students will have a solid understanding of how public international law shapes Bangladesh's foreign policy and domestic legal framework.