The Max Planck Encyclopedias of International Law

Welcome to the home of the most trusted reference work in international law, the Max Planck Encyclopedia of Public International Law, as well as the recently launched Max Planck Encyclopedia of International Procedural Law. The two Encyclopedias can be searched and browsed together, or separately by using appropriate filters. Find out more about the Encyclopedias and their teams by following the links on this page.

Discover freely accessible articles regarding the conflict between Russia & Ukraine

Readers wishing to gain a better understanding of the international law topics relevant to the invasion of Ukraine, its international economic and political consequences, and the investigations of international crimes committed during the invasion will find detailed coverage of the key concepts in the Max Planck Encyclopedias of International Law. To assist readers interested in these concepts, the general editors of the Max Planck Encyclopedia of Public International Law (MPEPIL) and the Max Planck Encyclopedia of International Procedural Law (MPEiPro) have selected the following articles of particular importance, which have been made freely available for a limited time. Explore the articles here.