This collection of essays pays homage to the multifarious and enduring work of Kalliopi K. Koufa, the first woman to become Professor of International Law in Greece. The volume brings together 37 contributions of renowned international law scholars from all over the world on a wide spectrum of important contemporary theoretical and practical issues. The essays reflect the multiple faces, the expanding scope and diversity of contemporary international law. Areas covered include the use of force, dispute settlement, international criminal law, international environmental law and, most notably, terrorism and human rights, areas on which the work of Professor Koufa in the United Nations and elsewhere has been particularly influential.