Sixty years ago, on 23 October 1956, an international conference at the United Nations (UN) headquarters in New York adopted the Statute of the International Atomic Energy Agency (IAEA). The document is almost as long as the UN Charter and remains the legal foundation of ‘the Agency,’ as the world nuclear organization is widely called. This H-Diplo/ISSF policy roundtable uses the anniversary as an opportunity to discuss the IAEA’s mandate and role in history and current affairs. Does the IAEA Statute, which was written in a very different context, stand up to scrutiny today? What does the answer suggest about the IAEA and institutions of global nuclear governance more generally? How can the IAEA be strengthened?