Surp Asdvadzadzin is the mother church of Istanbul's Armenians, and it hides behind a courtyard wall in the lanes off Kumkapı's fish-tavern square. Ottoman rules kept non-Muslim churches low and unshowy, so it is easy to walk straight past the gate. Step through and the plainness falls away: a gilded high altar rises behind its curtain, the Holy Mother of God above it, and the air holds beeswax and the low weave of Armenian chant. The patriarchate's offices stand across the lane.
The church took its seat in Kumkapı in 1641, in a warren of wooden houses that fire swept through four times in two centuries. The stone building that finally replaced them in 1828, designed by Krikor Balyan of the family that raised the sultans' palaces, is still standing. Below it lies an older layer: a spring chapel dedicated to Saint Theodore, left from the Byzantine church that stood on this ground first. Inside, the high altar you see is not old at all — Sarkis Kiçik carved it in 2006. About sixty thousand Armenians live in Istanbul now, and the thirty-eight churches that serve them are all directed from this compound.