In this episode of "The Rest Is History," Dominic and Tom delve into the rise of the Medici family in 15th-century Florence, focusing on Cosimo de' Medici. They explore Florence's economic foundations in cloth and credit, its republican political system, and the emerging tensions between rich and poor families. The hosts discuss Cosimo's early life, education in humanism, and strategic business decisions that led to the Medici bank becoming a major power in Europe. The narrative covers Cosimo's exile and triumphant return to Florence, his manipulation of the political system, and his patronage of the arts as a means of both spiritual redemption and status enhancement. The episode concludes with Cosimo's death and legacy, setting the stage for the next episode on Lorenzo the Magnificent.