The Igreja de São Sebastião, inaugurated in 1888, is the small but graceful neoclassical church on the eastern edge of the Largo de São Sebastião. Its single bell tower, pale yellow facade, and rose-window above the entrance form a quietly handsome counterpoint to the much grander Teatro across the square.
The single-nave interior is plain but for the painted ceiling and the marble side altars. The church is curiously asymmetrical from the outside: a second tower was planned but never built, supposedly because the carved stone for it was lost when its ship sank en route from Europe — a story locals like to tell.