As you enter the church, take a minute and look to your left, to the fresco on the south wall of the narthex. It depicts the litany of the image of the Virgin Hodegetria (“She who shows the Way”), an event that took place every Tuesday in Constantinople. A man is shown holding the icon on his shoulder, surrounded by groups of men and women. An impressive building with columns is visible at the back, with women observing the litany from the balconies. At the foot of the fresco is a lively depiction of various scenes from the marketplace: a man is selling caviar, a woman is selling cabbages, another one has a string of small containers hanging from her neck while two men enjoy a beverage.