Crypt dedicated to San Casto, Cathedral of Saints Nazario, Celso and Vittore, Old Town, Trivento, Campobasso, Molise, Italy, Europe

crypt san casto cathedral saints nazario celso vittore old town trivento campobasso molise italy europe historical site architecture stone arches ancient columns religious site underground heritage visitors exploration italy tourism cultural attraction medieval architecture sacred space historical significance preserved craftsmanship lighting tranquil spiritual artistry stonework altar ambiance tourism travel cultural heritage heritage site monuments history pilgrimage reverence site visit religious architecture chapel excavation local history community visitor experience