Final answer:
The Great Mosque at Djenné does not have a single tower rising in the center of the structure; instead, it has other features like a walled courtyard, sun-dried bricks, and wooden scaffold poles.
Step-by-step explanation:
The Islamic Great Mosque at Djenné in Mali exhibits several characteristic architectural features, but there is one listed element that it does not possess. The architectural features it includes are a walled courtyard in front of a wall facing Mecca, the use of sun-dried bricks and puddle clay, as well as wooden poles which serve both as a scaffold for workers to replaster the building and as a form of exterior ornamentation. The element that the Great Mosque at Djenné does not exhibit is a single tower rising in the center of the structure; instead, traditional mosque designs, including the Great Mosque at Djenné, commonly feature one or more towers known as minarets positioned at different places in the mosque's layout. The central tower is not characteristic of the Great Mosque's design.