抄録
Francesco Borromini designed two courtyards in the Oratorian institution in Rome. In Borromini's opinion, the courtyards had so important functions, because the Oratorians could receive visitors politely in The First Courtyard, and renew their vitality in The Second Courtyard as a spacious garden. Moreover, they needed to have visual and psychological effects in the view. To comprehend Borromini's design method from the viewpoint of the perspective, the compositions of the section-perspectives of the courtyards in Opus architectonicum should be reconstructed.
So, it is confirmed that the compositions are accurate, and the vanishing points are slightly lower than the top of the first arcade. They reflect the Borromini's idea of the view on the south terrace in The Second Courtyard. And it is recognized that the prospect from the Oratroy is so effective in The First Courtyard, and Borromini's niches are significant for the clear view. Borromini's image is represented by views and prospects in the courtyards in Opus.
