Kumkapı means sand gate — the old Byzantine gate in the sea walls where ships once tied up at the base of the historic peninsula. The neighbourhood that grew around it is one of the city's last layered ones: the Armenian Patriarchate of Constantinople still sits at its centre, Greek Orthodox parishes still hold services on Sundays, and the fish meyhanes in the covered passages still serve the same five fish at long tables on weekend nights.
Two and a half kilometres, evening only, the dinner is part of the walk. Arrive at Kumkapı Marmaray and head south toward the water. The Armenian Patriarchate is the heart — Surp Asdvadzadzin, the Cathedral of the Holy Mother of God, has been the Patriarch's seat since 1641. Modest dress for the courtyard; ask before entering during a service.
Walk back through the residential streets. Wooden houses, small grocers, the architectural rhythm of an Istanbul that survives in pockets.
End in the meyhanes. Telli Odalar Sokak and the streets around it are lined with covered tables and white tablecloths, fish on ice in the windows. Order palamut if it's autumn, lüfer if it's winter, rakı always. Walk back to Marmaray slowly.