The unborn child proved to be male, John I, to the relief of the kingdom. But the infant lived for only a few days. Philip saw his chance and broke the agreement with the Duke of Burgundy by having himself anointed at Reims in January 1317 as Philip V of France. Agnes of France, daughter of Saint Louis, mother of the Duke of Burgundy, and maternal grandmother of the Princess Joan, considered it an usurpation and demanded an assembly of the peers, which Philip V accepted.