The people of medieval Ghana were Islam.

Islam. Ergun Cander stated, "He said while Islam may seem unfamiliar, it can best be described as medieval Mormonism."

All Christianity - medieval, ancient, modern and otherwise - differs from Judaism and Islam in worshiping Jesus of Nazareth as the Son of God, Lord and Savior.

Alick Macdonnel McLean has written:

'The urban everyman' -- subject(s): Buildings, structures, Cities and towns, Medieval, City planning, Economic conditions, History, Medieval Cities and towns, Social conditions, Sociology, Urban, Urban Sociology

Aside from pagans, nearly everyone in medieval Europe believed in the same God, who was the God of Judaism, Christianity, and Islam.