Prothesis chapel / Diakonikon description:
According to the excavators, the northern wing might have been functioned as a chapel, except of the western most baptisterium room. The easternmost room was higher in comparison with the other rooms of the wing. Its bema measured 4.4 X 3.9 m; the step raised on one step (0.35 m) above the hall. At subphase a bench was built abutting the The floor of the room was paved with a white mosaic floor decorated with the plain geometrical patterns in the center. The central room measured 7.8 X 4.3 m and was paved with a mosaic floor with a more complicated geometric patterns (carpet measured 5.50x2.10 m).
Most probably, all the northern wing was used as a baptisterium of the "processional type". The baptisterium was reached from the northern aisle of the domus. It was comprised from three main spaces, intending for the full sacrament of baptism for catechumens. The spaces were separated from each other by the short chancel screens, comprised with two panels between the pilasters (attached to the walls) and posts in the mid, with the passage between up to 0.70 cm. In the mid of them there were narrow passages. Screens were leaning on the stylobata. Two eastern rooms functioned as a reception hall (?) and apodyterion, where the cathechumes were undressed and anointed with oil. The western room, containing the baptismal font, functioned as hagia ton hagion (or the ‘holy of holies’), were the catechumens were baptized (measures 4.3 X 6.4 m; the floor was paved with a white mosaic and raised ca. 0.4 m above the floor of the chapel's hall). After the baptism neophotistoi (newly illumined) would be proceeded to the chrismarion (probably, the central and the largest room of the northern wing). There they were dressed into the new white clothes, given lit candles and passed to the main church for the first Holy Communium (Eucharistium). The baptismal font itself was looted, only the imprints were left, which let us to reconstruct the shape of the font: from the outer side it had a shape of the octagon with eight concave niches, from the inner side it as the cross shaped font with the depression in the center.