Dr León Castellanos-Jankiewicz


  • Department:
    Research Department
  • Main field of interest: Human Rights Politics of memory International legal theory Minority protection Public International Law


León Castellanos-Jankiewicz is Researcher in International Law at the Asser Institute and Academic Coordinator of the Netherlands Network for Human Rights Research. His work focuses on international human rights law, the history of international law and minority protection. His paper 'Nationality, Alienage and Early International Rights' was awarded the inaugural David D. Caron Prize by the American Society of International Law in its 2019 Annual Meeting. Previously, he worked as Postdoctoral Researcher for the Dutch team in the Project on Memory Laws in European and Comparative Perspective. In the summers of 2013 and 2014, he was Assistant to Juan Manuel Gómez Robledo at the United Nations International Law Commission.

Prior to taking his position at the Asser Institute, León was Max Weber Postdoctoral Fellow at the European University Institute, Florence, where he co-organized a multidisciplinary research workshop on 'National Political Communities and International Institutions'. He has also been Visiting Research Fellow at the Lauterpacht Centre for International Law, University of Cambridge (2017), Vienna's Institute for Human Sciences (2016) and Harvard Law School's Graduate Program (2015-16). Between 2017 and 2018 he was Postdoctoral Mobility Fellow of the Swiss National Science Foundation. He holds a PhD in International Law from the Graduate Institute of International and Development Studies (summa cum laude), an MA in International Law from the Graduate Institute and a law degree from Anahuac Mayab University. 

León has extensive teaching experience, having delivered courses on various aspects of public international law at Bocconi University School of Law (Milan), the Riga Graduate School of Law, the University of Amsterdam and Leiden University. He has conducted Masters thesis supervisions at the University of Amsterdam, has been daily PhD supervisor at the Asser Institute and holds the Teaching Certificate issued by the European University Insitute's Max Weber Programme for Postdoctoral Studies. In addition to his academic work, León has delivered expert legal opinions and workshops at the OSCE High Commissioner on National Minorities, the Mexican Foreign Ministry and the Centre for Constitutional Studies of the Mexican Supreme Court.

Edited works

  • International Law and Time: Narratives and Techniques, Berlin, Springer, co-editor with K. Polackova Van Der Ploeg and L. Pasquet (forthcoming).

  • Special Issue on ‘Historical Memory in Post-Communist Europe and the Rule of Law’ (2020) 5 European Papers (co-editor with G. Baranowska).

Articles and book chapters

  • ‘Minority Rights Petitions: League of Nations’, Max Planck Encyclopedia of International Procedural Law (EiPro), Oxford, Oxford University Press (accepted).

  • ‘National Minorities and the Pitfalls of ‘Timeless’ Human Rights’ in K. Polackova Van Der Ploeg, L. Pasquet and L. Castellanos-Jankiewicz, International Law and Time: Narratives and Techniques, Berlin, Springer (forthcoming).

  • ‘Introduction: Historical Memory in Post-Communist Europe and the Rule of Law’ (2020) 5 European Papers 95-106 (with G. Baranowska). DOI: 10.15166/2499-8249/386.

  • ‘Negotiating Equality: Minority Protection in the Versailles Settlement’ (2019) in M. Erpelding and H. Ruiz Fabri (eds), Peace Through Law: The Versailles Peace Treaty and Dispute Settlement after World War I, Nomos/Hart. DOI: 10.5771/9783845299167.

  • ‘Serious Breaches of Peremptory Norms’ (2014) in A. Nollkaemper and I. Plakokefalos (eds), Principles of Shared Responsibility in International Law: An Appraisal of the State of the Art, Cambridge, Cambridge University Press, pp 284-311 (with E. Wyler). DOI: 10.17/CBO9781139940009.

  • ‘Security Council Listing Procedures and Human Rights’ (2013) Revista In Jure Anáhuac Mayab Vol. 1 No. 2, pp. 117-142, ISSN 2007-6045.

  • 'Causation and International Shared Responsibility' (2012) ACIL Research Paper No. 2012/07 (SHARES Series), Amsterdam Center for International Law.

  • ‘State Responsibility and International Crimes’ (2010) in W. Schabas and N. Bernaz (eds), Routledge Handbook of International Criminal Law, Oxford, Routledge, pp 385-406 (with E. Wyler). ISBN: 9780415524506.

Academic blog posts

Media & opinion (selected)

Twitter: @Leoncastjan