In the post-Cold War period, post-conflict, or transitional, judicial mechanisms have emerged strongly as a mechanism for the restoration and maintenance of international peace and security. How successful have these courts been? How far has evidence led to successful prosecution? How far does the evidence at trials help create an authoritative history of conflicts characterised by atrocity? How far does visual evidence have an impact? Visual material has been particularly important in the generation, conduct and impact of international war crimes prosecutions from Nazi concentration camps shown at the Nuremberg Trial to the trials of Slobodan Milosevic and Saddam Hussein. The impact of prosecuting war crimes on peace and security has been uneven, calling these prosecutions into question. But, where there has been significant impact, it is visual material that has done this.