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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.


The Ultimate International Procedural Law Collection & Quiz

To celebrate the launch of the Max Planck Encyclopedia of International Procedural Law we have curated a collection of free articles illuminating the systems and processes through which international law is made, interpreted, and adjudicated in practice. Explore the collection and take our quiz to discover 15 intriguing things you should know about international legal procedure.

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Site News

September 13, 2019

MPEPIL Update

4 updated articles are now available on MPEPIL.

September 9, 2019

ESIL 2019 Collection

Explore a collection of articles and book chapters on the theme of 'Sovereignty: A concept in flux?'.

September 6, 2019

OSAIL Update

1 new title has been added to OSAIL.

September 5, 2019

International Procedural Law Collection & Quiz

Explore a collection of free MPEiPro articles and take our international procedural law quiz.