The Organisation of African Unity was an intergovernmental organization established on 25 May 1963 in Addis Ababa, Ethiopia, with 33 signatory governments. One of the main heads for OAU's establishment was Kwame Nkrumah of Ghana. It was disbanded on 9 July 2002 by its last chairman, South African President Thabo Mbeki, and replaced by the African Union (AU). Some of the key aims of the OAU were to encourage political and economic integration among member states, and to eradicate colonialism and neo-colonialism from the African continent.

Addis Ababa is the capital and largest city of Ethiopia. In the 2007 census, the city's population was estimated to be 2,739,551 inhabitants. Addis Ababa is a highly developed and important cultural, artistic, financial and administrative centre of Ethiopia.