In 1909, the members of the Orléans-Braganza Branch of the Brazilian Imperial Family signed an agreement with Prince Philippe, Duke of Orléans (1869–1926), the Head of the House of Orléans (the former Royal Family of France), called the "family pact". By this agreement, all of them were counted in the French line of succession, being properly styled "Royal Highness". Combined with the earlier style "Imperial Highness", determined in the Imperial Constitution of 1824,[1] since then on the Head of the family (named Head of the Imperial House), the Heir to the Headship (named Prince Imperial), and the eldest son of the Imperial Prince (Prince of Grão-Pará) uses the style "Imperial and Royal Highness".