The old cathedral of Milazzo — formally Santa Maria Maggiore, known locally as the Duomo Vecchio — stands within the Spanish citadel inside the castle walls. Built in the 17th century and damaged by earthquake and later neglect, it was deconsecrated in the 19th century when the population shifted to the new town below. The building now stands partly ruined but increasingly well-presented, with conservation work revealing fragments of interior decoration.
The setting is extraordinary — a baroque cathedral shell inside a medieval fortress, ringed by the old citadel buildings. It is one of those places that is more interesting for being partially ruined than it would be if fully restored. Check for current access as conservation projects can affect opening hours.