His next work, also in mosaic, was in the church of St Peter's, where he executed some things in the principal chapel and for other parts of the church; but especially a God the Father, of large size with many figures, which he did for the facade. He also assisted in the completion of some mosaics on the facade of S. Maria Maggiore, somewhat improving the style, and departing slightly from the Byzantine manner, which was entirely devoid of merit. On his return to Tuscany, he did some work in mosaic for the Tarlati, lords of Pietramala, in the old Duomo, outside Arezzo, in a vault entirely constructed of spungite. He covered the middle part of this building with mosaics; but the church fell down in the time of Bishop Gentile Urbinate, because the old stone vaulting was too heavy for it, and it was afterwards rebuilt in brick by that bishop. On his departure from Arezzo, Gaddo went to Pisa, where he made, for a niche in the chapel of the Incoronata in the Duomo, the Ascension of Our Lady into Heaven, where Jesus Christ is awaiting her, with a richly appareled throne for her seat. This work was executed so well and so carefully for the time, that it is in an excellent state of preservation to-day. After this, Gaddo returned to Florence, intending to rest. Accordingly he amused himself in making some small mosaics, some of which are composed of egg-shells, with incredible diligence and patience, and a few of them, which are in the church of S. Giovanni at Florence, may still be seen. It is related that he made two of these for King Robert, but nothing more is known of the matter. This much must suffice for the mosaics of Gaddo Gaddi. Of pictures he painted a great number, among them that which is on the screen of the chapel of the Minerbetti in S. Maria Novella, and many others sent to different places in Tuscany. Thus, by producing now mosaics and now paintings, he executed many very tolerable works in both mediums, which will always assure him good credit and reputation. There is a great deal more which I might say about Gaddo, but I will pass it over in silence, because the manner of the painters of those days cannot be of great assistance to artists; and I shall dwell at greater length upon the lives of those who may be of some help, because they introduced improvements into the art. Gaddo lived seventy-three years, and died in 1312. He was honourably buried in S. Croce by his son Taddeo. This Taddeo, who had Giotto for his godfather, was the only one of all Gaddo's children who became a painter, learning the rudiments of the art from his father and the rest from Giotto. Besides Taddeo, a Pisan painter named Vicino was also a pupil of Gaddo. He did some excellent work in mosaic for the great tribune of the Duomo of Pisa, where the following words still testify to his authorship: