Between Mantua, Goito, and Buscoldo, Mantegna spent the last forty-six years of his life in continual employment, broken only by a short visit to Florence in 1466, and another to Bologna in 1472,[206] and by a longer residence in Rome between the years 1488 and 1490. During the latter period Innocent VIII. was Pope. He had built a chapel in the Belvedere of the Vatican, and wished the greatest painter of the day to decorate it. Therefore he wrote to Francesco, Marquis of Mantua, requesting that he might avail himself of Mantegna's skill. Francesco, though unwilling to part with his painter in ordinary, thought it unadvisable to disappoint the Pope. Accordingly he dubbed Mantegna knight, and sent him to Rome. The chapel painted in fresco for Innocent was ruthlessly destroyed by Pius VI.; and thus the world has lost one of Mantegna's masterpieces, executed while his genius was at its zenith. On his return to Mantua he finished the decorations of the Castello of the Gonzaghi, and completed his greatest surviving work, the "Triumph of Julius Caesar." By his wife, Nicolosia, the sister of Giovanni and Gentile Bellini, Mantegna had several children, one of whom, Francesco, adopted painting as a trade. The great artist was by temper arrogant and haughty; nor could he succeed in living peaceably with any of his neighbours. It appears that he spent habitually more money than he could well afford, freely indulging his taste for magnificence, and disbursing large sums in the purchase of curiosities. Long before his death his estate had been involved in debt; and after his decease, his sons were forced to sell the pictures in his studio for the payment of pressing creditors. He was buried in Alberti's church of S. Andrea at Mantua, in a chapel decorated at his own expense. Over the grave was placed a bronze bust, most noble in modelling and perfect in execution. The broad forehead with its deeply cloven furrows, the stern and piercing eyes, the large lips compressed with nervous energy, the massive nose, the strength of jaw and chin, and the superb clusters of the hair escaping from a laurel-wreath upon the royal head, are such as realise for us our notion of a Roman in the days of the Republic. Mantegna's own genius has inspired this masterpiece, which tradition assigns to the medallist Sperando Maglioli. Whoever wrought it, must have felt the incubation of the mighty painter's spirit, and have striven to express in bronze the character of his uncompromising art.