Aya Triada wears something no Istanbul church had shown for four centuries: a great dome, flanked by twin bell towers, raised in the open for the whole city to see. When it was consecrated in 1880, the Ottoman rules that had long kept churches low and bell-less were loosening, and the Greek community of Pera answered by building the largest Orthodox church in the city. Its architect, Vasilaki Ioannidis, mixed styles freely — pointed Gothic windows, a sober grey stone face, and that dome — and set it behind an iron gate and a small garden just off Taksim Square.
Step through the gate and the roar of Taksim falls away. Inside, a tall carved iconostasis climbs the sanctuary wall, its tiers of gilded icons catching the light from the high windows, in a nave built to hold a thousand voices. The church was damaged in the unrest of 1955 and carefully restored, and it still serves a congregation that has grown small. On a quiet weekday you may share it with a caretaker and a few burning candles; on a feast day it fills again, and the bells ring out over İstiklal as they were finally allowed to.