In 1402 , Filippo Maria Visconti , Duke of Milan — son of Gian Galeazzo Visconti and Caterina Visconti — ruled over the state , following the death of his father .
Head entity: caterina visconti Q2464997 17 18
Tail entity: filippo maria visconti Q289285 3 4 5
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25