Djolof
The Portuguese arrived in the Jolof Empire between 1444 and 1510, leaving detailed accounts of a very advanced political system. There was a developed hierarchical system involving different classes of royal and non-royal nobles, free men, occupational castes, and slaves. Occupational castes included blacksmiths, jewelers, tanners, tailors, musicians, and "griots". Smiths were important to the society for their ability to make weapons of war as well as their trusted status for mediating disputes fairly. Griots were employed by every important family as chroniclers and advisors, without whom much of early Jolof history would be unknown. Jolof's nobility were nominally animists, but some combined this with Islam. However, Islam had not dominated Wolof society until about the 19th century.