Antonio Cassese (1 January 1937 – 21 October 2011) was an Italian jurist who specialized in public international law. He started his career as a professor of law in Florence and Oxford and became a key figure in the development of international criminal law, expanding the body of international law through his books, law journals and decisions from the bench. He served as the first president of the International Criminal Tribunal for the former Yugoslavia, where after his tenure as President, he continued to sit as a Tribunal judge until 2000. He was outspoken in urging his fellow lawyers and Western governments into providing more support for the fledgling tribunal. And he played a central role in defining rules that would guide it and that have since served as a model for other tribunals and courts.
Judge Cassese was a president of the European Committee for the Prevention of Torture, and chairman of the UN Commission of Inquiry into Violation of Human Rights and Humanitarian Law in Darfur. Cassese was the first President of the Special Tribunal for Lebanon which he presided over until his resignation on health grounds on 1 October 2011.