new walls with five gates and renovated the architecture of the city in the 14th century, but the political situation in the city did not settle until the third Gonzaga, Ludovico Gonzaga, eliminated his relatives, seizing power for himself. During the Renaissance, the Gonzaga family softened their despotic rule and raised the level of culture and refinement in Mantua. Mantua was a significant center of Renaissance art and humanism. Marquis Gianfrancesco Gonzaga had brought Vittorino da Feltre to Mantua in 1423 to open his famous humanist school, the Casa Giocosa.
Through a payment of 120,000 golden florins in 1433, Gianfrancesco I was appointed marquis of Mantua by Emperor Sigismund, whose daughter Barbara of Brandenburg he married. In 1459 Pope Pius II held the Council of Mantua to proclaim a crusade against the Turks. Under Francesco II the famous Renaissance painter Andrea Mantegna worked in Mantua as court painter, producing some of his most outstanding works.
The first Duke of Mantua was Federico II Gonzaga, who acquired the title from Emperor Charles V in 1530. Federico commissioned Giulio Romano to build the famous Palazzo Te, on the periphery of the city, and profoundly improved the city. In the late 16th century Claudio Monteverdi came to Mantua from his native Cremona. He worked for the court of Vincenzo I Gonzaga, first as a singer and violist, then as music director, marrying the court singer Claudia Cattaneo in 1599.
In 1627, the direct line of the Gonzaga family came to an end with the vicious and weak Vincenzo II, and the town slowly declined under the new rulers, the Gonzaga-Nevers, a cadet French branch of the family. The War of the Mantuan Succession broke out, and in 1630 an Imperial army of 36,000 Landsknecht mercenaries besieged Mantua, bringing the plague with them. Mantua never recovered from this disaster. Ferdinand Carlo IV, an inept ruler whose only interest was in holding parties and theatrical shows, allied with
