Covering the structure’s Western tympanum are mosaic made Patriarch figures inside niches. To this day, only three of the figures remain in good condition.

Istanbul’s Patriarchs Young İgnatios is in the first niche, Saint İoannes Khrysostomos on the fourth and Antioch’s Patriarch Saint İgnatios Theophoros on the sixth. The mosaic pieces seen on the seventh niche are believed to belong to Athanasios. Although the exact dates for the mosaics are unknown, they are presumed to date back to 9-10 century.