Giovanni Battista Doria was a doge of Genoa

Doge of Genoa

The Republic of Genoa, in what is now northern Italy, was technically a communal republic in the early Middle Ages, although it was actually an oligarchy ruled by a small group of merchant families, from whom were selected the Doges of Genoa.- History :...

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He was born in Genoa

Genoa

Genoa |Ligurian]] Zena ; Latin and, archaically, English Genua) is a city and an important seaport in northern Italy, the capital of the Province of Genoa and of the region of Liguria....

, the son of Agostino Doria and Soprana Grimaldi. His fortunes were tightly connected with those of Andrea Doria

Andrea Doria

Andrea Doria was an Italian condottiere and admiral from Genoa.-Early life:Doria was born at Oneglia from the ancient Genoese family, the Doria di Oneglia branch of the old Doria, de Oria or de Auria family. His parents were related: Ceva Doria, co-lord of Oneglia, and Caracosa Doria, of the...

. After the latter's fleet had disembarked in the port of Genoa, Giovanni Battista was sent by French governor Teodoro Trivulzio

Teodoro Trivulzio

Teodoro Trivulzio was an Italian condottiero and marshal of France.He was born in Milan, the nephew of Gian Giacomo Trivulzio. He took part in the Italian Wars under the French King Louis XII, fighting in the French vanguard at the battle of Agnadello and in the battle of Ravenna...

 to investigate the admiral's intentions. Later, when the Republic had been restored, he was elected doge in 1537 at the presence of Andrea Doria. During his two years of rule, new walls were built near the Acquasola Gate.

He died at Genoa in 1563. Two of his sons, Nicolò and Agostino, were also doge in 1579-1581 and 1601-1603.