The Central Bank of West African States is a central bank serving the eight west African countries which share the common West African CFA franc currency and comprise the West African Economic and Monetary Union:
Benin
Burkina Faso
Guinea-Bissau
Wikipedia https://en.wikipedia.org/wiki/Central_Bank_of_West_African_States
Official Website http://www.bceao.int/
Address Rue 11, Dakar, Senegal
Coordinates 14°40'56.202" N -17°26'42.255" E