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 new high altar for the icon of the Madonna was commissioned by Cardinal Giuliano della Rovere, the nephew of the pope, or Cardinal Rodrigo Borgia in 1473. Another relative, Cardinal Domenico della Rovere bought two chapels on the right side. He transformed the first one into a funeral chapel and sold the other one to Cardinal Jorge da Costa in 1488. The next papal family, the Cybos furnished the second chapel on the right in the 1490s, and also the third chapel on the left, while the third chapel on the right went to another cardinal-nephew of Pope Sixtus, Girolamo Basso della Rovere. In the first chapel on the left a confidant of the pope, Bishop Giovanni Montemirabile was buried in 1479. Another confidant, Cardinal Giovanni Battista Mellini was buried in the third chapel on the left after his death in 1478. The two artists most closely associated with this period of the church were the sculptor Andrea Bregno and the painter Pinturicchio.