Located in the Monterroso rectory, it has four sections: ethnography, religious and civil gold and silverware, archaeology and diplomacy. We can highlight architectonic pieces such as a double window from the 8th century that belonged to an old monastery from the area, a processional cross, a silver censer in Compostela style, a stone boar from the 2nd century AD, as well as various mills and pieces of Castro culture from the region.