From 1346 to 1349 he lived in exile , until he was called back by his uncle Giovanni Visconti .
He was born in Milan , the son of Stefano Visconti and Valentina Doria .
From 1346 to 1349 son lived in exile , until son was called back by son 's uncle Giovanni Visconti .
He was born in Milan , the son of Stefano Visconti and Valentina Doria .