Gianfrancesco Penni
Born in Florence to a family of weavers, Penni entered Raphael's workshop very early in his life, and collaborated with him on several works, including the famous Rooms of the Vatican Palace, as well as the frescoes of Villa Farnesina, both in Rome. Heinrich Wölfflin and some other writers credited him with the entire execution of the Raphael Cartoons, with Raphael only creating the initial design, though more recent writers believe Raphael did much of the work himself.
Florentine painting
But the main source of Raphael's popularity was not his major works, but his small Florentine pictures of the Madonna and Christ Child. Over and over he painted the same plump calm-faced blonde woman and her succession of chubby babies, the most famous probably being "La Belle Jardinière" ("The Madonna of the Beautiful Garden"), now in the Louvre. His larger work, the "Sistine Madonna", used as a design for countless stained glass windows, has come, in the 21st century, to provide the iconic image of two small cherubs which has been reproduced on everything from paper table napkins to umbrellas.