 On the left, two figures may be identified as Lorenzo Tornabuoni, son of Ghirlandaio's patron, and Piero di Lorenzo de' Medici, the former's friend.In the righthand group is a self-portrait of the artist with some of his relatives.The loggia in the background could be a representation of the Ospedale di San Paolo (St. Paul's Hospital), which was then under construction in the same square as Santa Maria Novella.