This exhibition catalogue documents L’arte a Siena sotto i Medici, 1555–1609, the show held at Palazzo Pubblico in Siena from May 3 to September 15, 1980. Published by De Luca Editori d’Arte, it presents a comprehensive survey of Sienese art under Medici rule, examining major painters, patrons, and stylistic developments in the late Renaissance through detailed entries, scholarly texts, and numerous illustrations in black‑and‑white and color. The catalogue contextualizes artistic responses to political change and cultural exchange in sixteenth‑ and early seventeenth‑century Siena, offering a valuable reference for Renaissance art historians and students of Sienese cultural history.