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 Cartoons
The Raphael Cartoons are seven large cartoons for tapestries, belonging to the British Royal Collection but since 1865 on loan to the Victoria and Albert Museum in London, designed by the High Renaissance painter Raphael in 1515-16 and showing scenes from the Gospels and Acts of the Apostles. They are the only surviving members of a set of ten cartoons commissioned by Pope Leo X for tapestries for the Sistine Chapel in the Vatican Palace, which are still (on special occasions) hung below Michelangelo's famous ceiling. Reproduced in the form of prints, they rivalled Michelangelo's ceiling as the most famous and influential designs of the Renaissance, and were well known to all artists of the Renaissance and Baroque. Admiration of them reached its highest pitch in the 18th and 19th centuries; they were described as "the Parthenon sculptures of modern art".