The fortress had three entrance gates, one of them being a watergate to the Danube. The ramparts of the small fort were reinforced with 4 m high circular towers and symmetrically arranged triangular and rectangular bastions.
Fetislam was changing its rulers, who demolished and rebuilt it, adapting it to their military and strategic needs. It was among last Ottoman strongholds in Serbia from 1818 and in 1867 it was handed over, together with three other fortresses, to Prince Mihailo Obrenović of Serbia.
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