This chapter details the ways in which international criminal tribunals such as the ICTY have contributed to human rights law and protections. In construing the material elements of crimes under international humanitarian law, international criminal tribunals have had recourse to human rights law and jurisprudence, thereby strengthening human rights law and opening new avenues for its penal enforcement. The beginnings of these developments can be traced, first, to the drafting of crimes against humanity clauses in the Nuremberg Charter and, second, to the drafting of Common Article 3 of the Geneva Conventions. The tribunals have also made immense contributions to strengthening the proscriptions of rape as war crimes, crimes against humanity, and genocidal acts. With respect to persecution, the ICTY held that persecution is the gross or blatant denial, on discriminatory grounds, of a fundamental right, laid down in international customary or treaty law, reaching the same level of gravity as the other acts prohibited as crimes against humanity.