text: The greater part of Poggio's long life was spent in attendance to his duties in the Roman Curia at Rome and the other cities the pope was constrained to move his court. Although he spent most of his adult life in his papal service, he considered himself a Florentine working for the papacy. He actively kept his links to Florence and remained in constant communication with his learned and influential Florentine friends: Coluccio Salutati (1331–1406), Niccolò de' Niccoli (1364–1437), Lorenzo de' Medici the elder (1395–1440), Leonardo Bruni (Chancellor, 1369–1444), Carlo Marsuppini ("Carlo Aretino", Chancellor, 1399–1453), and Cosimo de' Medici (1389–1464).
  In England
  After Martin V was elected as the new pope in November 1417, Poggio, although not holding any office, accompanied his court to Mantua in late 1418, but, once there, decided to accept the invitation of Henry, Cardinal Beaufort, bishop of Winchester, to go to England. His five years spent in England, until returning to Rome in 1423, were the least productive and satisfactory of his life.
  In Florence
  Poggio resided in Florence during 1434−36 with Eugene IV. On the proceeds of a sale of a manuscript of Livy in 1434, he built himself a villa in the Valdarno, which he adorned with a collection of antique sculpture (notably a series of busts meant to represent thinkers and writers of antiquity), coins and inscriptions, works that were familiar to his friend Donatello.