Constanza married John "of Gaunt" England, [DUKE OF LANCAST in Sep 1371 in , Rochefort-sur-Me, Charente-Maritim, France. John (son of Edward III King of Eng Plantagenet and Queen Phillippa of Hainault, Countess of Holland") was born on 24 Jul 1340 in Ghent, East Flanders, Belgium; was christened on 24 Jun 1340 in Ghent, East Flanders, Belgium; died on 3 Feb 1399 in Leicester Castle, Leicester, Leicestershire, England; was buried on 15 Mar 1399 in St. Pauls Cathedral, London, Middlesex, ENGLAND. [Group Sheet] [Family Chart]