[1] Having been private secretary of Pope Pius II,[2] on the latter's death on 14 August 1464, Patrizi entered the service of the pope's nephew, Cardinal Francesco Todeschini Piccolomini and in 1471, he accompanied the cardinal in that capacity on a journey to Germany to attend the Imperial Diet at Ratisbon.
[3] Patrizi also served as a master of ceremonies in the papal chapel under Pope Paul II, resigning the post on 26 January 1484, subsequent to his appointment on 19 January as Bishop of Pienza and Bishop of Montalcino by Pope Sixtus IV.
[4] It was under his new title, Augustinus episcopus Pientinus et Ilcinensis.
He served as papal Master of Ceremonies from 1483, by appointment of Pope Paul II and after a brief interruption in 1484–1485,[9] he was reappointed by Pope Innocent VIII on 24 December 1485.
[10] Having published on 1 March 1488 the first systematic description of ceremonies connected with the papal court, the Sacrarum caeremoniarum sive rituum ecclesiasticorum Sanctae Romanae ecclesiae libri tres.