The prothesis and the diaconicon are represented by chapels to north and south of the apse.
The two smaller compartments and apses at the sides of the bema were sacristies, the diaconicon and prothesis.
At the east end a door, unsymmetrically placed, leads to the small chapel which was originally the prothesis.
It is covered either with a barrel or with a cross-groined vault, and communicates with the prothesis and the diaconicon.
The place of the prothesis has been taken by a similar door and a small Turkish dome.
The prothesis and diaconicon have barrel vaults and apses with three sides projecting slightly on the exterior.
prothesis would most likely have been put for it by a Greek.
The position of the prothesis and diaconicon in particular is identical in the two churches.