Cosimo de' Medici

Cosimo di Giovanni de' Medici (27 September 1389 – 1 August 1464) was an Italian banker and politician who became the de facto first ruler of Florence during the Italian Renaissance, establishing the Medici family as its effective leaders for generations. His power derived from his wealth as a banker and intermarriage with other rich and powerful families. He was a patron of arts, learning, and architecture. He spent over 600,000 gold florins (approx. $500 million inflation adjusted) on art and culture, including Donatello's David, the first freestanding nude male sculpture since antiquity.

Despite his influence, his power was not absolute; he was viewed by fellow Florentine politicians as first among equals rather than an autocrat. Florence's legislative councils resisted his proposals throughout his political career, even sending him into exile from 1433 to 1434.

Biography

Early life and family business

Cosimo de' Medici was born in Florence to Giovanni di Bicci de' Medici and his wife Piccarda Bueri on 27 September 1389. At the time, it was customary to indicate the name of one's father in one's name for the purpose of distinguishing the identities of two like-named individuals; thus, Giovanni was the son of Bicci, and Cosimo's name was properly rendered Cosimo di Giovanni de' Medici. He was born along with a twin brother Damiano, who survived only a short time. The twins were named after Saints Cosmas and Damian, whose feast day was then celebrated on 27 September; Cosimo would later celebrate his own birthday on that day, his "name day", rather than on the actual date of his birth. Cosimo also had a brother Lorenzo, known as "Lorenzo the Elder", who was some six years younger and participated in the family's banking enterprise.