The mission of The Italian Yearbook of International Law (IYIL) is to make available to the English-speaking public the Italian contribution to the literature and practice of international law. Volume XXXIII opens with a memoir of Francesco Francioni who passed away in February 2024. Next, it features a monographic section on current issues of international environmental and climate law. There follows a symposium on the scientific legacy of Benedetto Conforti and a focus section on the recent judgments by the Italian Constitutional Court on the Nazi Crimes Reparations Fund and the case of Giulio Regeni. As in every volume the following sections, each containing a wealth of scholarly contributions and bibliographical materials, are included: Notes and Comments, Practice of International Courts and Tribunals, Italian Practice Relating to International Law and Bibliographies.