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.
Transfiguration (Raphael)
The Transfiguration is the last painting by the Italian High Renaissance master Raphael. Commissioned by Cardinal Giulio de Medici, the later Pope Clement VII (1523–1534) and conceived as an altarpiece for the Narbonne Cathedral in France, Raphael worked on it until his death in 1520. The painting exemplifies Raphael's development as an artist and the culmination of his career. Unusually for a depiction of the Transfiguration of Jesus in Christian art, the subject is combined with an additional episode from the Gospels in the lower part of the painting.