Beyond this comes the main body of the building, entered by three doors. It is separated by ranges of double columns into nave and two aisles. These columns are of grey granite, white marble, and blue limestone; they are broken for the most part into numerous fragments; the shafts of some are entire, as are most of the capitals, and the bases of all remain in their original position. These show that there was a double range; a large shaft with a square base, and a smaller one with a round base touching it, towards the aisles; the one no doubt supported the roof of the nave, the other that over the aisles.

It is easy to recognise the period of the Pagan Emperors; a later epoch, with a certain amount of Christian art, and ultimately a period of absolute decadence, probably the last time that Christians worked in this country. The first is marked by Corinthian columns, the capitals of which are in the most correct form, and the shafts of polished marble and granite, and of a beauty which would only have been marred by fluting. The second is represented by fragments of fluted and spiral columns, the capitals of which were richly decorated with foliage; and lastly, there are rough productions in stone, out of all keeping with the rest of the building, the capitals of which bear grotesque representations of fishes, perhaps used as the symbol of Christ.

At the extreme north end is an apse, raised above the level of the nave, with three steps on which to mount to it. On either side is a square chamber, corresponding to the termination of the aisles. From the first to the fourth pillars on each side, and again across from the fourth on one side to the fourth on the other, are grooves to receive a railing, showing that this part was divided off with the apse to form, perhaps, at first the prætor’s court, and subsequently the sacrarium; in the centre of this space is an oblong vault, or cavity. The whole of the floor is covered with tesselated pavements of very elegant designs and admirable execution. These are almost perfect in condition, and have been judiciously covered over with a layer of earth to protect them from injury.

Descending from the east side aisle by a flight of about thirteen steps is a chapel of the form of a trefoil inscribed within a square.

From the north and south apses are communications with small lateral chambers right and left, and from the south one there is access through a small ante-room to a sepulchral chamber beyond; the front of each apse was arched, the arches supported on each side by columns of green marble.

In the centre of the square contained between them was what appears to be the foundation of an altar; the walls were covered, for a part at least of their height, with a mosaic of the richest marbles, porphyry, and serpentine, so disposed as to form either pictorial designs or geometric patterns, while the ceiling was a mosaic of glass, quantities of tesseræ, both coloured and gilt, having been found amongst the débris.

This building was probably an addition, subsequent to the erection of the main body of the basilica. It is also certain that it must have replaced a still older structure, as traces of tesselated pavement were found four feet below the actual floor.

A large sarcophagus of marble, with Christian figures rudely sculptured, was found at the bottom of the stairs.

In the sepulchral chamber above mentioned was found a tesselated pavement, containing four inscriptions recording the interment of individuals beneath them. One is that of Palladius, Bishop of Idicra, near Cirta (Constantine), who died here on his return from the Council of Carthage, under Huneric, in A.D. 484. This inscription was headed by a cross, having in the lower right hand angle the letter Omega. It is curious to observe that the corresponding one on the left hand does not contain the Alpha, as is usually the case. It has been said that this was owing to the fact of the bishop having died out of his own diocese. The tomb was opened, thus destroying the inscription, but the bishop’s skeleton was found perfectly preserved after fourteen centuries. It rested on a bed of laurel leaves, and its brown hair was undecayed. These venerable remains are preserved in the church of Tebessa, or rather in the curé’s house, which serves as such.

Another tomb was opened, that of Marcella, and in it were found perfectly preserved bones, and light hair. The inscription was also necessarily destroyed, but the others (three in number) were allowed to remain intact.