Being then summoned to Rome by Pope Sixtus IV to paint his chapel, in company with other masters, he painted there Christ calling Peter and Andrew from their nets, and the Resurrection of Jesus Christ, the greater part of which has since been spoilt in consequence of being over the door, on which it became necessary to replace an architrave that had fallen down. There was living in Rome at this same time Francesco Tornabuoni, a rich and honoured merchant, much the friend of Domenico. This man, whose wife had died in childbirth, as is told in the Life of Andrea Verrocchio, desiring to honour her as became their noble station, had caused a tomb to be made for her in the Minerva; and he also wished Domenico to paint the whole wall against which this tomb stood, and likewise to make for it a little panel in distemper. On that wall, therefore, he painted four stories--two of S. John the Baptist and two of the Madonna--which brought him truly great praise at that time. And Francesco took so much pleasure in his dealings with Domenico, that, when the latter returned to Florence rich in honour and in gains, Francesco recommended him by letters to his relative Giovanni, telling him how well the painter had served him in that work, and how well satisfied the Pope had been with his pictures. Hearing this, Giovanni began to contemplate employing him on some magnificent work, such as would honour his own memory and bring fame and profit to Domenico. Now it chanced that the principal chapel of S. Maria Novella (a convent of Preaching Friars), formerly painted by Andrea Orcagna, was injured in many parts by rain in consequence of the roof of the vaulting being badly covered. For this reason many citizens had wished to restore it, or rather, to have it painted anew; but the owners, who belonged to the family of the Ricci, had never consented to this, being unable to bear so great an expense themselves, and unwilling to allow others to do so, lest they should lose the rights of ownership and the distinction of the arms handed down to them by their ancestors. Giovanni, then, being desirous that Domenico should make him his memorial there, set to work in this matter, trying various ways; and finally he promised the Ricci to bear the whole expense himself, to give them some sort of recompense, and to have their arms placed in the most conspicuous and honourable place in that chapel. And so they came to an agreement, making a contract in the form of a very precise instrument according to the terms described above. Giovanni allotted this work to Domenico, with the same subjects as were painted there before; and they agreed that the price should be 1,200 gold ducats of full weight, with 200 more in the event of the work giving satisfaction to Giovanni. Thereupon Domenico put his hand to the work and laboured without ceasing for four years until he had finished it--which was in 1485--to the very great satisfaction and