Due to the frail state of Baldwin V, plans had already been made for deciding the kingdom's next ruler. The throne would be claimed by either his mother, Sibylla, or his aunt Isabella because they were the only surviving children of his grandfather Amalric I. The succession would be determined by a council consisting of Baldwin's kinsmen, the kings of England and France, Frederick I, Holy Roman Emperor, and the pope, then Urban III. In the meantime, his "most rightful heir" would act as "bailli". However, this agreement was completely ignored once Baldwin was dead, although it was later invoked by his paternal uncle Conrad of Montferrat (his nearest male relative) in his challenge to Guy's kingship after the Battle of Hattin of 1187.