Vaulted houses are built in Cameroon and Chad by Musgum peoples who are descendant of SAO people, the pioneer around the Lake Chad. In Cameroon, they are settling farther north; the national park called Waza, is founded on Musgum territory. Before the 12th century, the Musgum people with their neighbours formed the Kanen-Bornu Empire, a medieval African state.
The Musgum vaulted houses are made from compressed sun-dried mud. The tall conical dwellings, in the shape of a shell featured geometric raised patterns. The particularity of the buildings is their organic simplicity and the functions behind the forms; the thicker walls increase the stability of the building.