Already he may have been confused in Umbria with the very inferior master, Bernardino Mariotto of Perugia, who lived for many years at San Severino, where he had a school in the monastery of the old town. His paintings have often been assigned to his contemporary, and this is very likely the reason that the latter always signs and calls himself Pintoricchio. While he endeavoured to guard against being credited with works he had not produced, he has been robbed of those really due to him. It is strange indeed that for several centuries the part he took in such a great work as the Sixtine Chapel should have been ignored, for it was the success of these frescoes which sufficed to establish his fame in Rome, and for some years after this we find him in full employment there. The chapel was completed in 1485, but Pintoricchio's part was probably finished earlier, and it is at this time that most critics concur in placing his work in the church of Ara Cœli. He had commended himself to the patronage and friendship of Domenico della Rovere, brother of Pope Sixtus, and was a guest at his house in the Palazzo di SS. Apostoli, where he painted a decoration, and he was also employed at this time in the Palazzo Colonna. In the two following years, Pintoricchio was employed in the Belvedere of the Vatican by Pope Innocent VIII. He painted there the series of pictures of towns owning the papal sway, which Taja mentions as existing, though in a much injured condition, in 1750, and which was repainted under Pius VII.[5] In the years immediately following he was decorating the chapels in Santa Maria del Popolo, doing much with his own hand, but already employing assistants and superintending their share. [5] Vasari, iii. p. 498, note "Milanesi."