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He was chaplain to the Milanese lord Giovanni Visconti.
He wrote several chronicles dealing with the history of Milan and exalting the Visconti, who by his day had in effect become its ruling dynasty.
His numerous historical writings include the Chronica Galvagnana, the Chronicon extravagans de antiquitatibus Mediolani, the Chronicon maius, and the Manipolus florum seu Historia Mediolanensis; he is also known for a map of Milan c1330.
He died in Milan in 1344.