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.
Agostino Chigi
In Rome, Chigi's three artistic commissions involving Raphael remain the most prominent monuments of his contemporary fame: a chapel in Santa Maria della Pace; his mortuary chapel, the Chigi Chapel in Santa Maria del Popolo; and the suburban villa known since 1579 as the "Villa Farnesina", all of them intended to give substance to his legend. His splendid villa that he built on the shore of the Tiber, in Trastevere, bears the name of its later owners: Villa Farnesina ("illustration"). For its design, Chigi employed the Sienese painter Baldassare Peruzzi, virtually untried as an architect. Sebastiano del Piombo, Giovanni da Udine, Giulio Romano, Sodoma and Raphael were called upon to provide the decoration. Here Raphael frescoed his "Triumph of Galatea". Here Chigi held sumptuous repasts. In order to show his contempt of money, he was said to have all the silver dishes thrown into the river after the end of the parties; however, his servants were secretly ready to recollect them with nets draped under the windows. The villa called the "Viridario" in Chigi's time served as banking facility as well as residence, setting Chigi apart from the ordinary run of bankers in Rome, who normally resided in a "piano nobile" directly above but unconnected to their street-level "botteghe".