Before the slave trade and the colonial rule by the West, West Africa attained at its economic and social apogee with Ghana State, Mali Empire and Gao Empire. But our knowledge is limited, due to the scarceness of the historical documents. This article attempts to give a new light on the social and economic foundations of Gao State before 10 century, being based on data acquired through our archaeological researches in Mali.
Our excavation in Gao-Sane site found a building made of rectangular mud bricks, more than 400 glass and metal beads, oil lamps, a hundred of iron and copper items, a few spindles, and small crucibles. Also were found two kinds of copper boards in the shape of a sickle, which people should have circulated as money and have melt down to manufacture copper artifacts. The C14 analysis shows that this site would have been occupied between 8th and 10th century. The existence of different types of earthenware should be a reflection of the coexistence of different peoples: indigenous African people and the immigrant from North Africa. If this interpretation be correct, it will situate the beginning of the trans-Saharan commerce before 8th century, one or two centuries earlier than the commonly-held view.
Our excavation at Gao-ancient found big building totally made of stones, of 36m length, and of 12.5m width. Other findings include 10, 000 glass and stone beads, more than 1, 000 iron and copper items, a hundred of fragments of glassware and porcelain imported from North Africa. The C14 analysis shows that this building would have been constructed in the first half of the 10th century and abandoned before the end of the same century. The stones of the buildings being inexistent near the site, its owner should have been able to mobilize large quantities of manpower. This suggests, with the large scale of the building, the existence of the valuable imported goods, that the building was a royal palace. This interpretation being correct, it is the first discovery of the ‘medieval’ royal palace done by West African Archaeology.
Our findings in Gao ancient and Gao-Sane testify the historical records written in 10th century by Arab geographers, which speak of a twin city of Gao composed of royal residence and commercial center. They also clarify the modality of the manufactures and the commercial networks in West Africa between the 8th and 10th century.
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