Ribat

When the ribat was started to be erected in 821 by the Aghlabid rulers, it was principally a fortress against the Christians on Sicily.
The word 'ribat' comes from the same root as 'marabout', the North African name for holy men. Ribats of these times were generally connected to a very conservative and often ascetic practice of Islam.
Today, the ribat stands right on the Place Farhat Hached, and seems to be lost. What once was impressive, is inundated by the hustle of the modern town.