The International Atomic Energy Agency (IAEA), is officially formed as its creation statute enters into force on July 29, 1957. The first General Conference was held in Vienna in October 1957, where delegates decided to make Vienna the agency's headquarters. The IAEA had been created via an independent statue and opened for signatures on October 26, 1956.
It was established to promote peaceful uses of nuclear energy and it is an "autonomous organization" within the United Nations system, meaning it is independent but connected and reports to its General Assembly and Security Council. The IAEA's relationship with the UN is based on treaties that require it to submit reports to the UN General Assembly and the Security Council.