As a result on 17 December 1743 , aged of seventeen , Louise Henriette married her second cousin Louis Philippe d'Orl Ã ans at Versailles . As a result , on 17 December 1743 , at the age of seventeen , Louise Henriette married her second cousin , the Duke of Chartres , Louis Philippe d'Orl Ã ans , in the chapel of the Palace of Versailles .