The parish church of Opi stands at the high point of the village along Via Roma, its stone facade blending into the surrounding houses almost seamlessly. The building has medieval origins — probably 12th century — but what you see today is largely the result of a 17th-century reconstruction after earthquake damage. Inside, the single nave is plain and atmospheric, with a handful of modest artworks and a quiet dignity that suits the village.
The bell tower is the oldest surviving element, restored in the 16th century and visible from well outside the village. Step inside on a weekday afternoon and you will likely have the place to yourself. The church sits at the centre of Opi's small historic core, and a walk around the surrounding lanes — stone walls, arched doorways, the occasional cat — takes all of ten minutes but is worth doing slowly.