With the death of Ercole Contrari in 1557 , Vignola was assigned to Giacomo Boncompagni , son of Pope Gregory XIII .
Head entity: giacomo boncompagni Q1401822 13 14
Tail entity: pope gregory xiii Q83029 18 19 20
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40