In the 15th century, Florence was among the largest cities in Europe, with a population of 60,000, and was considered rich and economically successful. Cosimo de' Medici was the first Medici family member to essentially control the city from behind the scenes. Although the city was technically a democracy of sorts, his power came from a vast patronage network along with his alliance to the new immigrants, the "gente nuova" (new people). The fact that the Medici were bankers to the pope also contributed to their ascendancy. Cosimo was succeeded by his son Piero, who was, soon after, succeeded by Cosimo's grandson, Lorenzo in 1469. Lorenzo was a great patron of the arts, commissioning works by Michelangelo, Leonardo da Vinci and Botticelli. Lorenzo was an accomplished poet and musician and brought composers and singers to Florence, including Alexander Agricola, Johannes Ghiselin, and Heinrich Isaac. By contemporary Florentines (and since), he was known as "Lorenzo the Magnificent" (Lorenzo il Magnifico).