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 main door is more monumental that the others. Its pointed pediment is filled with a sculpture of the "Madonna and the Child" set in a scallop shell. The rim of the niche is decorated with cherubs among six-pointed stars and whiffs of clouds. The frieze has a fine carved decoration of artificial foliage, pecking birds and three putti who are holding torches and oak branches in their hands and carrying bowls of fruit on their heads. The coat-of-arms of Pope Sixtus IV on the lintel is encircled by oak branches. The carvings around the door are the only significant sculptural decorations on the façade and as a whole they summarize the iconographic program of the Sistine rebuilding. The central motif is the Madonna del Popolo surrounded by the symbols of heavenly light and paradisiacal abundance, intertwined with the emblem of the Della Rovere dynasty, and set in a perfectly classical frame.