Haïdra (Arabic: حيدرة) is a municipality in western Tunisia, containing the ruins of Ammaedara, one of the oldest Roman cities in Africa. It was a diocese and is now a Roman Catholic titular see.

Quick Facts حيدرة, Country ...

Haïdra حيدرة
Archaeology site of Haidra
Haïdra Location in Tunisia
Coordinates: 35°34′N 8°28′E
Country	Tunisia
Governorate	Kasserine Governorate
Government
• Mayor	Kamel Boudhiafi (Nidaa Tounes)
Population  (2014)
• Total	3,451
Time zone	UTC1 (CET)
Postal code	1221[1]

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Ammaedara was on the border between the valleys and the Berber tribes and was part of the Roman province of Byzacena.

The Third Augustan Legion (Legio III Augusta) was installed in Ammaedara in 30 BC where they built their first fortress. From here the legion was partly responsible for the urbanisation of the North African provinces, building roads and other infrastructure. Its ruins include mausoleums, Byzantine fortresses, underground baths and a church.^[2]

Excavation of what has been called the Church of Melleus in the centre of Ammaedara has brought to light the tombs of some bishops of the see. In addition, documentary records survive of Eugenius, a bishop of Ammaedara, who participated in the Council of Carthage (255), which discussed the question of the lapsi, and of Speratus and Crescentianus, representing respectively the Catholics and the Donatists of the city, who took part in the Council of Carthage (411) of 411. Later Catholic bishops were Hyacinthus and Melleus, both of the second half of the 6th century.^{[3][4][5][6][7][8]}

Given the Roman province, it must have been a suffragan of the Metropolitan archbishop of its capital Hadrumetum (modern Sousse, also in Tunisia).

• Ahmed Jdey (10 June 1951 – 20 July 2012), author, historian and professor.^[10]