Maestro Pietro of Florence was evidently a man at the head of his profession, for at Città di Castello, when he was summoned to Perugia to appraise the work of Maestro Torzuolo, he was engaged in making for the canons there a wooden ceiling for the nave of their church, which was, by a contract dated 1499, to be ornamented with large roses similar to the ornamentation of the ceiling of the council-hall in the Palazzo Vecchio at Florence; giving us thus another indication of the degree of general interest and attention which these works excited in those days. The communication between city and city was difficult and comparatively unfrequent, yet the fame of any fine work of the sort we are talking of evidently not only reached far and wide among other cities, but forthwith excited their rivalry and led to the production of other _chefs-d'oeuvre_. Maestro Pietro was to receive for the ceiling of the nave at Città di Castello no less a sum than five hundred golden ducats, equal to at least seventeen thousand five hundred dollars at the present day. We find him also employed as architect to direct the construction of a cupola of the church of Calcinaio. This carpenter was, then, an architect also; and Professor Rossi remarks that it is by no means the only case of the kind. Maestro Mattia, the other expert called to appraise the work done by Maestro Torzuolo for the canons of the cathedral of Perugia, was already well and favorably known in that city, for he had been employed in 1495 to appraise some work which had been done for the choir of the monks of St. Lorenzo; in that same year we find him executing some very elaborate work for the convent of St. Augustine; and on the 20th of December there was read at a meeting of the municipal council a petition from Maestro Mattia to be admitted to the freedom of the city of Perugia; which request the masters of the guilds, "taking into consideration the industry, the mode of life and the moral character" of the petitioner, were pleased to grant, on the condition that he, together with two other persons admitted to citizenship at the same time, should make a present to the corporation of a silver dish and forty pounds' weight of copper money, and, further, that he should give the masters and treasurers of his own guild a dinner.