The ancient tribal arts that have inspired so many modern artists are here displayed in all of their strength and stylised symbolism. Nigeria's ancient artistic tradition, extending from the fifth century BC to the present time, has generated a wealth of art styles, in ivory, brass, terra cotta and wood. East of Nigeria, diverse ethnic groups comprising the Cameroons can be divided into four style-regions, ranging from the highly abstract designs of the northern area to the bold decorations of the Grasslands.