As an alternative to permanent setting critical that the design of the New St. Peter’s in Rome would be the outcome of a ‘turning point’ in the architectural conceptions of Bramante, motivated by the direct knowledge of the most significant Roman antiquities, attention is being paid to the previous period biography of Donato. Mention of Milanese buildings in GDSU 8Av sheet allow, in fact, to initiate a ‘mapping’ of sources and architectural calculations by which to identify what may have constituted for thought in his meetings with Leonardo, Francesco di Giorgio and Giuliano da Sangallo, contributing the formation of the “mental equipment” with which it is addressed the preparation of projects for the Vatican Basilica. The study is proposed as the author’s initial contribution to a survey conducted by Richard Schofield.
