This work finished, Giovanni, desiring to see again his old and ailing father, departed from Perugia in order to return to Pisa; but, passing through Florence, he was forced to stay, to the end that he might apply himself, together with others, to the work of the Mills on the Arno, which were being made at S. Gregorio near the Piazza de' Mozzi. But finally, having had news that his father Niccola was dead, he went to Pisa, where, by reason of his worth, he was received by the whole city with great honour, every man rejoicing that after the loss of Niccola there still remained Giovanni, as heir both of his talents and of his wealth. And the occasion having come of making proof of him, their opinion was in no way disappointed, because, there being certain things to do in the small but most ornate Church of S. Maria della Spina, they were given to Giovanni to do, and he, putting his hand thereunto, with the help of some of his boys brought many ornaments in that oratory to that perfection that is seen to-day; which work, in so far as we can judge, must have been held miraculous in those times, and all the more that he made in one figure the portrait of Niccola from nature, as best he knew. Seeing this, the Pisans, who long before had had the idea and the wish to make a place of burial for all the inhabitants of the city, both noble and plebeian, either in order not to fill the Duomo with graves or for some other reason, caused Giovanni to make the edifice of the Campo Santo, which is on the Piazza del Duomo, towards the walls; wherefore he, with good design and with much judgment, made it in that manner and with those ornaments of marble and of that size which are to be seen; and because there was no consideration of expense, the roof was made of lead. And outside the principal door there are seen these words carved in marble: A.D. MCCLXXVIII. TEMPORE DOMINI FREDERIGI ARCHIEPISCOPI PISANI, ET DOMINI TARLATI POTESTATIS, OPERARIO ORLANDO SARDELLA, JOHANNE MAGISTRO AEDIFICANTE.