This PhD dissertation examines international responsibility for the crime of aggression from a public international law perspective. Under customary international law, as well as the amendments to the Rome Statute of the International Criminal Court adopted in the Review Conference in Kampala in 2010,…

On 3 March 2022, Cambridge University Press published An Introduction to Public International Law, a co-authored textbook led by Cecily Rose.

Jus post bellum, the body of laws and norms governing the transition from armed conflict to peace, has emerged as a crucial issue for international law scholars, governments, and all concerned with building a just and sustainable peace. The Jus Post Bellum Project, funded by the NWO and hosted by the…

The European Society of International Law (ESIL) awarded its 2020 Book Prize to Daniel Peat, an Assistant Professor of Public International Law at the Grotius Centre for International Legal Studies at Leiden Law School. The ESIL Book Prize is awarded annually 'for an outstanding published work in the…

We are glad to present our new research report on Exploring the Frontiers of International Law (EFIL). International Law has traditionally been one of the flagship areas of the Leiden Law School. The report provides a taste of our rich research agenda in international law.

On Monday, 18 January 2016 the Grotius Centre for International Legal Studies hosted a roundtable on the practice, process, strategy and impact of the amicus curiae in international criminal trials.

The Grotius Centre for International Legal Studies is offering two internships on a full-time basis in spring 2019.

On 30 November 2016, Cecily Rose participated in a Symposium held at the T.M.C. Asser Institute on 'A Court for the World? Trust in the ICJ 50 years after South West Africa'.

The Leiden University team won second place in the highly competitive Dutch National Rounds of the Philip C. Jessup International Law Moot Court Competition in Amsterdam in February 2023. The team did well in both the written and oral segments of the competition, and Marleen Onnekes was awarded the…

The Public Prosecution Service in the Netherlands is examining the possibility to prosecute Dutch national Jitse Akse on the suspicion of the multiple murder of Islamic State fighters. As a foreign fighter Akse joined the Kurdish militia YPG in its armed struggle against the Islamic State.

The Grotius Centre for International Legal Studies, in collaboration with the Cambridge Centre for Environment, Energy and Natural Resource Governance (‘C-EENRG’, University of Cambridge) and the ESIL Interest Group (IG) on International Criminal Justice, is pleased to invite public international scholars,…

The Grotius Centre for International Legal Studies, in collaboration with the ESIL Interest Group on International Criminal Justice and the Journal of International Criminal Justice (JICJ, OUP), is pleased to invite public international scholars, students and practitioners to attend a conference that…

On Friday, November 17, 2017, Assistant Professor Jens Iverson provided the Keynote for the annual symposium by the Minnesota Journal of International Law: Jus Post Bellum: Justice After the War.

Every year, the Netherlands Red Cross and Belgian Red Cross-Flanders organise the Frits Kalshoven IHL Competition. This competition aims to provide students with an opportunity to practically engage with IHL, the rules that govern the conduct of war, by attending expert lectures and workshops, engaging…

Helen Duffy was appointed as the Gieskes Chair of Human Rights and International Humanitarian Law last year. As the title suggests, her research, and to a large extent her teaching, focuses on how diverse areas of international law co-apply and interrelate.

For the first time, a court has ordered a company to reduce its carbon dioxide emissions. Lawyers see it as a landmark ruling that will have far-reaching consequences for Shell and possibly also other similar companies.

On 14 April 2016, Professor Carsten Stahn, Programme Director of the Grotius Centre for International Legal Studies in The Hague, and Ambassador Bernd Borchardt, Founding Director of the International Nuremberg Principles Academy, signed a new partnership agreement on research cooperation and joint…

On Monday 30 May 2016, the Assistant High Commissioner for Protection at UNHCR, Mr. Volker Türk, delivered the Keynote Address at the Advanced Course on International Criminal Justice, Migration and Human Trafficking at the Peace Palace in The Hague.

Leiden Law School and the Grotius Centre for International Legal Studies are very pleased to announce that Dr. Mamadou Hébié will be re-joining the Grotius Centre on the 1st of May 2021.

We are pleased to invite abstracts for the conference ‘H2OLAW – Law-Science Interfaces within the Law of the Sea and Fresh Water Law’ hosted by the Grotius Centre for International Legal Studies, Leiden University. The conference will take place on 26 and 27 September 2024 at Leiden University in the…

Dr Letizia Lo Giacco is the recipient of the 2024 Rosalyn Higgins Prize for her article titled 'When a Dispute Exists: The Emerging Evidentiary Practice of the ICJ in Common Interests Proceedings'.

Jason Rudall, Assistant Professor of Public International Law at the Grotius Centre for International Legal Studies, has published a monograph entitled 'Responsibility for Environmental Damage'.

On Thursday 28 January 2016, Prof. Carsten Stahn contributed to the OPCW Sub-Working Group on Non-State Actors, together with Professors Andrew Clapham (Geneva) and Dapo Akande (Oxford), in the presence of the Ahmet Üzümcü, Director-General of the OPCW.

The recently opened ICPA (International Centre for the Prosecution of the Crime of Aggression Against Ukraine) in The Hague will be responsible for coordinating the prosecution of Russia for the crime of aggression and possibly also the prosecution of Vladimir Putin. The ICPA aims to close the gaps…

Alumnus Petri Freundlich received the first prize for his LL.M. thesis in the category Master’s theses and academic articles of the Max van der Stoel Human Rights awards 2017