sentences:  During its time as free commune and "signoria" ("lordship"), the Lords of Mantua were exponents of the Bonacolsi and Gonzaga families.From 1328, Mantua was informally led by Gonzagas until 1433, when Gianfrancesco Gonzaga assumed the noble title of Marquess of Mantua.In 1530, Federico II received the title of Duke of Mantua.