Many and various were the discussions that arose on this subject, on the ground that such a work as that façade should have been distributed among several persons, and in the matter of the architecture many craftsmen flocked to Rome to see the Pope, and made designs; Baccio d'Agnolo, Antonio da San Gallo, Andrea Sansovino and Jacopo Sansovino, and the gracious Raffaello da Urbino, who was afterwards summoned to Florence for that purpose at the time of the Pope's visit. Thereupon Michelagnolo resolved to make a model and not to accept anyone beyond himself as his guide or superior in the architecture of such a work; but this refusal of assistance was the reason that neither he nor any other executed the work, and that those masters returned in despair to their customary pursuits. Michelagnolo, going to Carrara, had an order authorizing that a thousand crowns should be paid to him by Jacopo Salviati; but on his arrival Jacopo was shut up in his room on business with some citizens, and Michelagnolo, refusing to wait for an audience, departed without saying a word and went straightway to Carrara. Jacopo heard of Michelagnolo's arrival, and, not finding him in Florence, sent him a thousand crowns to Carrara. The messenger demanded that Michelagnolo should write him a receipt, to which he answered that the money was for the expenses of the Pope and not for his own interest, and that the messenger might take it back, but that he was not accustomed to write out quittances or receipts for others; whereupon the other returned in alarm to Jacopo without a receipt.