The Church of St. Anthony of Padua is the largest Catholic church in Istanbul, set back from İstiklal behind a forecourt framed by twin brick apartment blocks. Most walkers stream straight past the iron gate. Step through it and the roar of the avenue thins away: a red-brick neo-Gothic facade rises at the end of the court, and inside, pointed arches march toward a rose window while candlelight pools in the side chapels. The air carries the hush of a working parish rather than a museum.
It was built between 1906 and 1912, after its two-century-old predecessor was cleared to make way for a tram line, and the Italian-Levantine architect Giulio Mongeri raised it in red brick and terracotta. Franciscan friars still run it, and Mass is said in Italian, English, Polish and Turkish for a congregation drawn from across the world. Angelo Roncalli preached here for a decade before he became Pope John XXIII, and learned Turkish to reach his flock.