The Ashanti, Adansi, Akyem, Assin, and Denkyira peoples of Ghana, like the Baoulé of Côte d'Ivoire, are subgroups of the West African Akan nation which is said to have migrated from the vicinity of the north-western Niger River after the fall of the Ghana Empire in the 13th century. Evidence of this is seen in royal courts of the Akan kings reflected by that of the Ashanti kings whose processions and ceremonies show remnants of ancient Ghana ceremonies. Ethnolinguists have substantiated the migration by tracing word usage and speech patterns along West Africa.