over half the astonishing profits of the Medici bank now came from the two Rome branches.
At the Council of Constance, however, the Medici suffered a setback. Pope John arrived at Constance at the end of October 1414 to find himself accused of all kinds of crimes including heresy, simony, tyranny, the murder by poison of Alexander V and the seduction ofno fewer than two hundred of the ladies of Bologna. After escaping from Constance disguised as a layman with a cross-bow slung over his shoulder, he was betrayed and brought back to face the Council, which deposed both him and Benedict XIII, accepted the resignation of Gregory XII, and elected a new pope, Martin V.
Pope John, ill and destitute, was held prisoner for three years in the Castle of Heidelberg until the Medici once more came to his help by arranging, through their Venetian branch, to pay a ransom for his release of 38,500 Rhenish gulden. Accompanied by Bartolomeo de’ Bardi (soon to become the Medici’s manager in Rome), the deposed Pope made his way to Florence where Giovanni de’ Medici welcomed him, provided him with a home for the remaining few months of his life, and interceded on his behalf with Martin V, who agreed to appoint him Cardinal-Bishop of Tusculum.
Martin V was then also living in Florence where he remained for two years at the monastery of Santa Maria Novella. 6 He was a gentle, simple man, but his relations with the Medici were not as close and friendly as Giovanni would have liked. There was trouble over a pearl-encrusted mitre which had come into Medici hands at the time of Pope John’s flight from Constance and which was only returned to the papal chancellor after Giovanni had been threatened with excommunication. There was trouble, too, over Pope John’s will, under the terms of which the Medici received a finger of St John the Baptist which the testator, whose trust in relics was unbounded, had carried with him always. Later there was a quarrel over Pope John’s tomb in the Baptistery, which contained upon its base the words ‘
Ioannes Quondam Papa XXIII
’, an inscription which Pope Martin V considered an affront to his own authority.
On 9 September 1420 Pope Martin left Florence for Rome accompanied by twelve cardinals. An immense procession of the city’s officials, representatives of the guilds and the colleges, and uniformed standard-bearers escorted him to the Porta di San Pier Gattolini where he gave them all his apostolic blessing. He then rode out of the city to the convent of San Gaggio. Here ‘he got down from his horse’, so a contemporary chronicler reported, ‘and asked for all the nuns of the convent to be brought before him. He blessedthem one after the other and kissed them on the forehead over their veils.’
Giovanni de’ Medici, who had accompanied the procession as one of the four
Cavalieri
, those honoured citizens of Florence who had the right to wear golden spurs, watched him depart and cannot have felt other than concerned that his bank’s relationship with the Papacy had become so strained. The Medici were not entirely excluded from curial business, but they no longer enjoyed the special privileges they had had in the time of Pope John XXIII. Now it was their ancient rivals, the Spini, who were favoured by the Papal Chamber. 7 But towards the end of 1420 the Spini company suddenly failed and were forced into bankruptcy. Soon afterwards the Medici manager in Rome took over their business, and his bank recovered its former position. Within a few years, indeed, the Medici bank became not only the most successful commercial enterprise in Italy, but the most profitable family business in the whole of Europe. For this as much credit was due to the elder son as to the father.
Cosimo had been born on 27 September 1389, the day upon which are commemorated the early Christian martyrs, Cosmas and Damian, the patron saints of physicians, whom he was often to have introduced into paintings commissioned by him