 More detailed design of the central areas of the capital, particularly its monumental core, was accomplished by Japanese architect Kenzo Tange, with his team of city planners at Kenzo Tange and Urtec company.Most countries relocated their embassies to Abuja, and many maintain their former embassies as consulates in Lagos, the commercial capital of Nigeria.Abuja is the headquarters of the Economic Community of West African States (ECOWAS) and the regional headquarters of OPEC.