thing of the most precious and rare description, so that when Frederick Barbarossa returned from his coronation at Rome, and was passing through Arezzo many years after its completion, he praised and admired it infinitely, and indeed with good cause, since the joints are constructed of tiny pieces so excellently welded together, that to an inexperienced eye, the whole work seems to be made in one piece. In the same church Giovanni made the chapel of the Ubertini, a noble family, and lords of a castle, as they still are, though they were formerly of greater estate. He adorned this with many marble ornaments, which are to-day covered over by many large ornaments of stone, placed there in the year 1535, after plans by Giorgio Vasari, for the support of an organ of extraordinary excellence and beauty which rests upon them. Giovanni Pisano also designed the church of S. Maria dei Servi, which has been destroyed in our day, together with many palaces of the noblest families of the city, for the reasons mentioned above. I must not omit to note that in the construction of the marble altar Giovanni was assisted by some Germans, who associated with him, rather for the sake of learning the art, than for gain, and who profited so much by his instruction, that when they went to Rome, after the completion of that work, they served Pope Boniface VIII. in many works of sculpture executed for St Peter's, and also in architecture, when he made Civita Castellana. They were, moreover, sent by that Pope to S. Maria at Orvieto, where they made a number of marble figures for the facade of the church, which were very tolerable for those times. But among the others who assisted Giovanni in his undertakings for the Vescovado at Arezzo, were Agostino and Agnolo, sculptors and architects of Siena, who far surpassed all the others, as will be said in the proper place. But to return to Giovanni. When he left Orvieto he came to Florence to see Arnolfo's building of S. Maria del Fiore, and also to see Giotto, of whom he had heard a great deal elsewhere; but no sooner had he arrived in Florence than he was appointed by the intendants of the fabric of S. Maria del Fiore to make the Madonna, which stands between two small angels above the door of that church, which leads into the canons' quarters, a work much praised at the time. He next made the small font for S. Giovanni, containing representations from the life of that saint in half-relief. Proceeding thence to Bologna he directed the construction of the principal chapel of the church of St Domenico, in which he was also commissioned to make the marble altar by Teodorico Borgognoni of Lucca, then bishop, a friar of that order. Later on (1298), in the same place, he made the marble table in which are Our Lady and eight other figures, all of very tolerable workmanship. In the year 1300, when Niccola da Prato was at Florence as cardinal legate of the Pope, for the purpose of settling the