The Institute of International Law (IIL) was founded on 8 September 1873 at the Ghent Town Hall in Belgium by eleven international lawyers of renown. The Institute is a learned society and its purpose is to promote the progress of international law. In recognition of its action in favour of arbitration among States, a peaceful means of settling disputes, the Institute has received the Nobel Peace Prize.
In August 2025, the Institute of International Law held its session in Rabat. You can find a summary of this session here.
The Opening Session took place at the Académie du Royaume du Maroc. You can watch the video below:
In 2023 the Institute of International Law celebrated its 150th anniversary during its 81st session of Angers from 27 August until 2 September 2023. In commemoration of its anniversary, the Institute launched:
150 Years of Contributing to the Development of International Law – Justitia et Pace (1873-2023)
