Welcome to Oxford Public International Law

Oxford Public International Law (OPIL) is a comprehensive, single location providing integrated access across our international law services, bringing you one step closer to the perfect research solution.

Our ground-breaking online resources work to speed up research and provide easy access to authoritative content, essential for anyone working in international law.

Treatise on International Criminal Law

Following the release of the newest edition of Treatise on International Criminal Law, a collection of articles written and co-written by author Kai Ambos from the Max Planck Encyclopedia of Public International Law (MPEPIL) and the Max Planck Encyclopedia of International Procedural Law (MPEiPro) has been made freely available for you to explore. Find out more here.