The Palazzo Ducale (Ducal Palace) in Mantua, also known as the Gonzaga Palace, is one of the city's main historic buildings. From 1308, it served as the official residence of the Lords of Mantua, initially the Bonacolsi, and later the main residence of the Gonzaga, who were lords, marquesses, and eventually dukes of the Virgilian city. It housed the reigning Gonzaga, his wife, their legitimate firstborn son, other legitimate children until adulthood, and notable guests. It was designated the Roy