The main church of the town was founded certainly before the beginning of the eleventh century on Roman ruins;probably a pagan building.In the centuries it experienced several adjustments;until the recent ruinous ones in 1905;made even worse by the repair works of 1955;after the violent bombardment in 1944.Outside the massive fourteenth-century bell-tower stands out.It is made of brick and surrounded at the top by Gothic little arches interlacing with each other.The Baroque ornaments added in 1660 were removed;so that today the church shows inside parts of its fourteenth-century Gothic structure:at Latin cross;it consists of a nave and two aisles divided by pillars and brick ogival arcades.It keeps on the high altar a stone frontal with bas-reliefs of the VII century.The thirteenth-century cross belongs to the typology with movable and detachable arms used in morality plays.The crypt dates before the eleventh-century and has pillars from a Roman building and thirteenth and fourteenth-century frescoes.