The current building, as we see it now, was rebuilt from 1817 to 1832 on the remains of the Romanesque church of the Santissimo Salvatore which was raised to the rank of a cathedral in 1462 by Pope Pius II. The task of preparing plans for rebuilding the church was assigned to the Sienese architect Agostino Fantastici, who in keeping with the artistic trend of the moment, gave the co-cathedral a . . .