The ancient baptismal church, built around the eleventh century and raised to the rank of cathedral in 1462 by Pope Pius II, was given the title of Santissimo Salvatore (Most Holy Savior) because it stood on the remains of a pagan temple dedicated to Jupiter the Savior. Anyone who wonders what it looked like should be told that the church of the Santissimo Salvatore was a Romanesque church which . . .