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The Max Planck Encyclopedia of Comparative Constitutional Law (MPECCoL) is a comprehensive online resource containing analytical comparative articles offering a global overview of constitutional law. Developed with constitutional lawyers, academics, and students in mind, the encyclopedia provides seamless navigation between encyclopedia articles, linking to commentaries and instruments from the Oxford Constitutions of the World and US Constitutional Law products, and through reference pages on the Oxford Law Citator.

While Oxford Constitutional Law offers Oxford’s leading constitutional law books, comprehensive and updated constitutional texts, and jurisdiction-by-jurisdiction commentary on those primary materials, MPECCoL provides a high level of analytical coverage of constitutional law topics in a comparative context. The articles address a focused range of topics that provide the best coverage of the essence, character, development, and history of constitutional law from a global perspective. The articles will define and cover the basis and foundations of state formation and constitutional law, as well as analysing and explaining on a global comparative perspective the underlying legal concepts such as: human rights; constitutional formation; scope of state protections; the defining structures of governmental makeup; types of legal structures and interactions within a constitutional law system; and legal constitutional concepts that make up constitutional law.

The encyclopedia articles will provide insight and detail into key cases that have contributed to or advanced constitutional law concepts on a global scale such as Brown v. Board of Education (United States), Mizrahi Bank Case (Israel), the Minerva Mills Case (India), and Marbury v. Madison (United States). The articles will also cover key instruments in constitutional law history such as the Magna Carta, the Charter of Medina, and the Cairo Declaration on Human Rights in Islam, among others.

MPECCoL will provide browsing and searching of all of the material within the resource based on keywords and subjects. Content is also connected to the Oxford Law Citator: a state-of-the-art navigation tool which provides direct links to related materials within MPECCoL, other online law resources from OUP, and important references available elsewhere.

Constitutional scholars and practitioners who are interested in contributing to the MPECCoL may direct their inquiries to contact@mpeccol.de

The Max Planck Encyclopedia of Comparative Constitutional Law is supported by funding from the Thyssen Foundation.

User benefits

  • Cross-search between components of the Oxford Constitutional Law service
  • New articles added, and content updated throughout the year
  • Find content quickly with sophisticated searching and filtering
  • Speed up the research process with personalization options - save often used articles for fast access in future sessions
  • Print friendly PDFs are available for each article
  • Extend research capabilities via the Oxford Law Citator


MPECCoL supports librarians by providing:

  • Excellent customer support
  • OpenURL compliance, connecting citations straight into the library’s catalogue
  • A clear Legal Notice and Privacy Policy, to refer to for issues such as printing and download limits
  • RSS feeds delivering the latest site news straight to your desktop


Obtaining Access to MPECCoL

Subscriptions and 30-day free-trials are available to institutions for all of our resources. To request a quote or free trial for MPECCoL for your institution, please contact our Library Marketing team.

If you are an academic, professional or student, you can recommend MPECCoL to your Librarian or take out a personal subscription.