The Convention on the Privileges and Immunities of the United Nations and the Convention on the Privileges and Immunities of the Specialized Agencies entered into force more than 60 years ago. This Commentary offers for the first time a comprehensive discussion covering both Conventions in their entirety, providing an overview of academic writings and jurisprudence for a legal field of particular practical relevance and gives both the academic researcher as well as the practitioner a unique source to understand the complexity of legal issues that the UN, its Specialized Agencies, their officials, Member States' representatives, and experts face in today's world.