This book tracks 78 years of member state flags displayed at the Headquarters of the United Nations, showing year-by-year changes in member state names and flags. It is a comprehensive vexillological reference on the dissolution of empires, the consolidation or schism of nations, and decolonization. From the initial 51 member states, of whom four were not yet independent nations, the UN has grown to 193 sovereign member states. Their flags on New York's First Avenue have borne a colorful witness to these changes.