The Iglesia San Francisco is the oldest surviving building in Santiago, completed in 1618 and one of the very few colonial structures left in a city that earthquakes have repeatedly levelled. The thick adobe walls and the sober Baroque facade look weathered and ancient in the best way — a genuine survivor in a city where most things are relatively new.
The attached museum holds a collection of colonial religious art, including 17th-century paintings from the Cusco School, carved wooden altars, and vestments. The small cloister is particularly beautiful — one of the few genuinely old courtyards in the city. The church is on the Alameda, diagonally opposite from the GAM cultural centre. Open for visits outside of mass times; the museum has separate hours.