In 146 BC, the Romans conquered the region, where existed an old city called "
Tbessa". Theveste was founded by the Romans in 75 AD near an old Berber village located next to the
Aurès Mountains, in order to control the mountain region. During the 1st century CE, the
Legio III Augusta resided there before being transferred to
Lambaesis. It was made a
colonia probably under
Trajan. Theveste flourished under
Septimius Severus reaching a population calculated in nearly 30,000 inhabitants, and was even an important Dioceses See. There is mention of a council held there by the
Donatists. Among its saints were
Lucius, its bishop, who assisted at the
Council of Carthage (256) and died as a martyr two years later;
Maximilianus, martyred 12 March, 295 AD; and
Crispina, martyred 5 December, 304 AD. By 400 AD, Crispina's grave, situated in a cemetery outside the town, had become a significant pilgrimage complex. Some of its bishops are known:
Romulus in 349 AD;
Urbicus in 411 AD;
Felix exiled by the
Vandals in 484 AD; and
Palladius mentioned in an inscription. During the 4th and 5th century AD, Thebeste was a centre of
Manichaeism as well. In June 1918 a codex of 26 leaves written in Latin by Manichaeans was discovered in a cave near the city. Theveste was raided by the
Vandals, but it was rebuilt and made part of
Byzantine North Africa at the beginning of the reign of
Justinian I by the
patricius Solomon. He erected a tomb there, which still exists. The city was nearly destroyed by
Umayyad Caliphate forces, but a small village (probably initially populated by a few surviving Christian Berbers) remained for centuries. Modern Tebessa is very rich in ancient monuments, among them being a
triumphal arch of
Caracalla, a temple, a Christian
basilica of the 4th century and the huge walls. ==Main architectural remains==