The relics of Symeon were located in the southern apse side room. This martyrion can be recognized from the outside by the third door in the south wall and by a tiny window next to the door through which the pilgrims could be supplied with holy oil. A direct door into the sanctuary suggests that the Symeon relic was also used during the service. The windows are bordered by a particularly elaborately designed cornice band. The façade also has oblique grooves and square depressions, probably from the base of a sloping roof and its purlins.