Sant Pau del Camp

A Romanesque former monastery in the Raval — one of the oldest churches in Barcelona, with a fortified, almost defensive feel that speaks to its age. Its great treasure is the small cloister, a quiet oasis of carved capitals and horseshoe arches tucked away from the gritty streets outside. The contrast is the point: step in from one of the city's most chaotic neighborhoods and find centuries of stillness. For visitors who appreciate medieval architecture and a moment of calm, it's a genuine hidden corner of old Barcelona, easily missed and well worth seeking out.