The decisions of international courts and tribunals affect how we read history. Alternative tribunals, such as peoples’ tribunals, attempt to write alternative histories to counter the official versions. This article locates controversies over the Armenian genocide in debates about the relationship between history and international law. It considers ways of reading archives and the role of archives in informing those debates. It compares the Istanbul war crimes trials held in 1919–1920 before the Ottoman Military Tribunals with the Paris session of the Permanent Peoples’ Tribunal held in 1984 that dealt with questions of history and memory through the juridical format of a hearing. A century after the events of 1915, the contested historiography of the Armenian genocide influences how international lawyers and historians seek to pass judgment on the past.