Julius II granted assent to the wealthy Sienese banker, Agostino Chigi, who was adopted into the Della Rovere family, to build a mausoleum replacing the second side chapel on the left in 1507. The chapel was dedicated to the Virgin of Loreto whose cult was ardently promoted by the Della Rovere popes. The Chigi Chapel was designed by Raphael and it was partially completed in 1516 but remained unfinished for a very long time. This ambitious project created a strong connection between the basilica and the Chigis that extended well into the next century.