Sublime

After Cosimo de’ Medici took over the family bank in the 1430s, it became the largest in Europe. By managing the fortunes of the continent’s wealthy families, the Medici made themselves the wealthiest of them all. They were innovators in bookkeeping, including the use of debit-and-credit accounting that became one of the great spurs to progress

Cosimo died in 1464, just as Leonardo arrived in Florence from Vinci. He was succeeded by his son and then, five years later, his famous grandson, Lorenzo de’ Medici, aptly dubbed Lorenzo the Magnificent.

The Medici family, who ultimately became the rulers of Florence, began as political bosses on the democratic side. Cosimo dei Medici (1389-1464), the first of the family to achieve clear pre-eminence, still had no official position; his power depended upon skill in manipulating elections.

The bribe bought Florence peace for a year, but in June 1502 Borgia was back. As his army sacked more surrounding towns, he commanded the leaders in Florence to send a delegation to hear his latest demands. Two people were selected to try to deal with him. The elder was Francesco Soderini, a wily Church leader who led one of the anti-Medici

While in Milan in 1507, Leonardo met a fourteen-year-old named Francesco Melzi (fig. 101). He was the son of a distinguished nobleman who was a captain in the Milanese militia and later a civil engineer who worked to reinforce the city’s fortifications, endeavors that fascinated Leonardo. The Melzis lived in the largest villa in the town of Vaprio,