Roman tribune, born at Rome, of humble origin; gave himself to the study of the ancient history of the city, became inspired with a noble ambition to restore its ancient glory, and being endowed with an eloquent tongue, persuaded, with sanction of Pope Clement VI., who was then at Avignon, his fellow-citizens to rise against the tyranny to which they were subjected at the hands of the nobles, in which he at length was successful; but his own rule became intolerable, and he was assassinated in an émeute just seven years after the commencement of his political career (1313-1354).