In 1499, the guild of the "cambio" (money-changers or bankers) of Perugia asked him to decorate their audience-hall, the "Sala delle Udienze del Collegio del Cambio". The humanist Francesco Maturanzio acted as his consultant. This extensive scheme, which may have been finished by 1500, comprised the painting of the vault, showing the seven planets and the signs of the zodiac (Perugino being responsible for the designs and his pupils most probably for the execution), and the representation on the walls of two sacred subjects: the Nativity and Transfiguration; in addition, the Eternal Father, the cardinal virtues of Justice, Prudence, Temperance and Fortitude, Cato as the emblem of wisdom, and numerous life-sized figures of classic worthies, prophets and sibyls figured in the program. On the mid-pilaster of the hall Perugino placed his own portrait in bust-form. It is probable that Raphael, who in boyhood, towards 1496, had been placed by his uncles under the tuition of Perugino, bore a hand in the work of the vaulting.