Considered one of the greatest examples of the Sudano-Sahelian architectural style native to West Africa, the Great Mosque of Djenné in central Mali was built in 1907, modeled after the original mosque that was built on the site in the 13th century. The impressive adobe structure has not been modernized (outside the installation of a loudspeaker system) for the sake of historical preservation, and a festival is held every year in which the entire local community takes part in its maintenance.