The Diocese of Fissiana (Latin: Fissianensis) is suppressed Latin Church diocese and current titular see of the Catholic Church.
The exact location for the seat of the diocese is unknown,[1] though Fissiana, is tentatively located somewhere near Foussana in modern Tunisia. In antiquity it was within the Roman province of Byzacena,[2] [3] corresponding to the modern Sahel region of Tunisia.
Of this dioceses only two Donatist bishops are known.
That the town was a stronghold of Donatism is not surprising, as it is located close to the heartland of that movement with many of the first Donatist congregations forming in the semi-arid region to the west and south west of Foussana.
Today Fissiana survives as titular bishopric[1] and the current bishop is Alejandro Daniel Pardo, Auxiliary bishop of Buenos Aires.[4]