This overview outlines the major artistic developments of the 16th century, defining the transition from the balanced naturalism of the High Renaissance to the intellectual complexity of Mannerism (Maniera). The lecture establishes the political backdrop of the era: the exile and return of the Medici, the Siege of Florence, and the ultimate establishment of the Grand Duchy, investigating how these traumatic events shattered the civic optimism of the previous century and introduced a new exemplary artistic canon for Italy and the West.