Beginning in the late 13th century, the Renaissance emerged in Italy, marked by a transition from medieval to early modern society with increasing urbanization, trade, and secular powers. Power was held by city-states like Florence, Venice, and Milan rather than centralized nations, and they were politically aligned with the Pope or other aristocratic families. During this time, Humanism grew as a philosophy focusing on human beings, history, science, and the arts. Important early Renaissance art included Duccio's Maestà altarpiece for Siena Cathedral, which celebrated the city's patron saint and victories, and Giotto's fresco cycles in the Scrovegni Chapel that advanced realistic, narrative painting. Sculpt