 Piazza Sant'Ignazio, surrounded by an ensemble of five residential buildings for the growing administration class of the city, is characterised by its complex interplay of ovoid shapes and the ingenious theatre-wing like construction.People walking from the nearby Piazza di Pietra find themselves suddenly emerging in Piazza S. Ignazio into a confrontation with the church, as if they had stumbled in from offstage.Although the decorative effect of the buildings is an important component of their overall effect, the ensemble signifies a significant departure from the typical operative logic of the anteposed piazza.