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.
Raphael Rooms
The "Stanza della segnatura" ("Room of the Signatura") was the first to be decorated by Raphael's frescoes. It was the study housing the library of Julius II, in which the Signatura of grace tribunal was originally located. The artist's concept brings into harmony the spirits of Antiquity and Christianity and reflects the contents of the pope's library with themes of theology, philosophy, jurisprudence, and the poetic arts, represented in tondi above the lunettes of the walls. The theme of this room is worldly and spiritual wisdom and the harmony which Renaissance humanists perceived between Christian teaching and Greek philosophy. The theme of wisdom is appropriate as this room was the council chamber for the Apostolic Signatura, where most of the important papal documents were signed and sealed.