In respect to the dome, the entire interior surface was at one point covered entirely in a single composition depicting the Pentecost. Between each of the twelve windows sat apostles. All that remains currently are remnants and preliminary sketches made in red ocher upon bare masonry. Around the calotte of the dome are remnants of two circles that would have represented the glory of the Etimasia. There exists a segment of a halo between windows nine and ten. A larger section of the painting still remains between windows ten and eleven and shows the upper half of a seated figure. A majority of the head is missing, but the beard and lower segment of the halo can still be seen. One can see the fold of his chlamys pass from his left shoulder to the height of his right knee . While no painting exists between windows eleven and twelve, there is a preserved drawing on the plaster and masonry. The figure appears to be St. Peter with a short beard and curly hair. The right hand is lifted with the palm facing outward in the form of blessing with the left hand holding a scroll. Unfortunately, much of the decoration within the apse was destroyed due to the central portion collapsing. However, there is still some fragmentary fresco decoration throughout. In the conch of the apse, one can discern two archangels standing against a dark blue background. One holds an orb while the other grasps a staff. All that is left of the leftmost angel is the outer edge of the right wing and the orb that was held in his right hand. The second archangel is just as poorly preserved. Part of the wing is discernible in an under painting along with the lower half of the staff. Between the angels stands the Virgin Mary. These three figures reside above a life sized procession of bishops clothed in pale garments and holding open scrolls. While only two can still be seen on either side of the bema, it is thought that there were originally eight. One of the bishops is perhaps St. Basil, but the other remaining figure remains nameless. The bishop thought to be St. Basil, located on the north wall of the bema, is preserved to below the knees and exhibits short dark hair and a long beard.The scroll is held in both hands and bears a text from the prayer of the first antiphon of St. Basil's liturgy. The vault of the bema holds a fresco of the Ascension with, what would have been six, apostles looking up at Christ being carried by four angels in a mandorla.