In 1390 , Giacomo was elected new doge of Genoa allowing his father to return to the city .
In 1379 he attempted in vain to replace the Byzantine emperor , John V Palaiologos , with his own son , Giacomo Fregoso .
In 1390 , Giacomo Fregoso was elected new doge of Genoa allowing his father to return to the city .
In 1379 he attempted in vain to replace the Byzantine emperor , John V Palaiologos , with his own son , Giacomo Fregoso .