Gianfrancesco I Gonzago had in 1433 assumed…
1530 CE
Gianfrancesco I Gonzago had in 1433 assumed the title of Marquis of Mantua with the recognition of Emperor Sigismund, while obtaining recognition from the local nobility through the marriage of his daughter Margherita to Leonello d'Este, Marquis of Ferrara in 1435.
In 1530, Federico II receives the hereditary title of Duke of Mantua by courtesy of the Spanish crown.