Santa Maria del Popolo
The architect or architects of this innovative project remain unknown due to a lack of contemporary sources. Giorgio Vasari in his "Lives" attributed all the important papal projects in Rome during Sixtus IV to a Florentine, Baccio Pontelli including the basilica and monastery of Santa Maria del Popolo. Modern researchers deemed this claim highly dubious and proposed other names among them Andrea Bregno, a Lombard sculptor and architect whose workshop certainly received important commissions in the basilica. The fundamental differences between the façade and the interior suggest that maybe more than one architect was working on the building.
Santa Maria del Popolo
The Cybo Chapel was radically rebuilt by Cardinal Alderano Cybo (1613–1700) between 1682 and 1687 according to the plans of Carlo Fontana. For the beauty of its paintings, the preciousness of marble revetments covering its walls and the importance of the artists involved in its construction the chapel is regarded one of the most significant sacral monuments erected in Rome in the last quarter of the 17th century.