The Great Mosque of Djenné is the largest sacred clay building in the world. It has a surface area of 75 x 75 metres and is also the largest single building made out of clay bricks. The Mosque is regarded as one of the high points of the Sudano-Sahelian architectural style. It is located in the centre of the city of Djenné in Mali – at the inner delta of the Niger. Together with Djenné’s Old Town, the Mosque is designated a world heritage site.