Palazzo Chigi stands on Via Chigi which opens onto Via San Lorenzo. The palace is a grandiose but austere 15th Century building. Its lines are simple to the point of severity and the walls bear no ornamentation. It is, therefore, quite different to the heavily ornamented medieval and late-medieval buildings of Viterbo with their characteristic diamond tipped friezes as, for example, on the nearby Palazzo degli Alessandri. The courtyard inside the palace has a loggia supported by a portico at the end of which is a fresco of the Madonna and Child.