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.
Piazza del Duomo, Milan
Azzone's successor Gian Galeazzo Visconti further enlarged the piazza, ordering the demolition of the bishop's house (in 1385) and the baptistery "San Giovanni alle Fonti" (in 1387). In the following decades, nevertheless, the piazza did not develop much, but one of the two "basilicae", Santa Maria Maggiore, was demolished, as the works for the construction of the Duomo had begun. In 1458, Pope Pius II granted Francesco Sforza and the Veneranda fabbrica del Duomo di Milano (the company that was responsible for the construction of the Duomo) the authorization to demolish Santa Tecla to create a larger square that would fit the Duomo's majesty. Somewhat preposterously, the basilica was partially rebuilt in the following years, to be demolished again in the mid-16th century.