Raphael only designed the fourth room, known as The Room of Constantine, as well as prepared some drawings. It was finished five years after his death by his best students, including Giulio Romano.
FUN FACT: the walls of the Room of Constantine also have a very unusual "portrait" that you must have noticed, which is of Annone. Annone was an elephant that the king of Portugal had donated to Pope Leo X, who kept and cherished it in the Vatican Gardens.
