Fethiye Mosque hides a chapel of Byzantine gold mosaics behind the wall of a working neighbourhood prayer hall. The chapel is kept apart from the mosque as a small museum, and it is the reason you come. You stand in a cramped, luminous space and look up at a stern Christ ringed by twelve prophets filling the dome. In the apse below, a gold mosaic shows Christ flanked by the Virgin and John the Baptist, close enough to read every face.
The chapel was built as a grave, attached to the south flank of the monastery church of the Theotokos Pammakaristos. Maria, widow of the protostrator Michael Glabas, a general of Andronikos II, raised it around 1310 over her husband's tomb and dedicated it to Christ the Word. Outside its door the hill belongs to Çarşamba, the quarter of the İsmailağa religious community. Men pass in turbans and long robes, women in black çarşafs, and the shopfronts along Fethiye Caddesi advertise alcohol-free perfume. Apartment blocks have taken most of the slope from the old houses. Hardly anyone in these lanes has come for the mosaics.