The African economy is regionally integrated through this union. The AU's secretariat, the African Union Commission, is based in Addis Ababa.

The African economy is regionally integrated through this union. The AU's secretariat, the African Union Commission, is based in Addis Ababa. The largest city in the AU is Lagos, Nigeria, while the largest urban agglomeration is Cairo, in Egypt. The African Union has more than 1.5 billion people and an area of around 30 million km2 (12 million sq mi) and includes world landmarks such as the Sahara and the Nile.