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.
Disputation of the Holy Sacrament
The Disputation of the Sacrament (), or Disputa, is a painting by the Italian Renaissance artist Raphael. It was painted between 1509 and 1510 as only the first part of Raphael's commission to decorate with frescoes the rooms that are now known as the Stanze di Raffaello, in the Apostolic Palace in the Vatican. At the time, this room was known as the Stanza della Segnatura, and was the private papal library where the supreme papal tribunal met.