Personal rule (1301–1312) thumb|right|Relief depicting Pope Boniface VIII, who legitimized in 1301 the marriage of Sancho IV of Castile with María de Molina, parents of Ferdinand IV. In November 1301, when the court was in the city of Burgos, was made public the bull by which Pope Boniface VIII legitimized the marriage of María de Molina with the late King Sancho IV, and therefore her children were legitimate from that moment. At the same time, Ferdinand IV attained his legal majority, who was officially declared on 6 December 1301. With this, John of Castile and the Infantes de la Cerda lost one of their main arguments when reclaiming the throne, not being able to use the illegitimacy of the Castilian monarch. In addition was also received the papal dispensation for the marriage of Fernando IV with Constance of Portugal.
Personal rule (1301–1312) thumb|right|Relief depicting Pope Boniface VIII who legitimized in 1301 the marriage of Sancho IV of Castile with María de Molina parents of Ferdinand IV In November 1301 when the court was in the city of Burgos was made public the bull by which Pope Boniface VIII legitimized the marriage of María de Molina with the late King Sancho IV and therefore her children were legitimate from that moment At the same time Ferdinand IV attained his legal majority who was officially declared on 6 December 1301 With this John of Castile and the Infantes de la Cerda lost one of their main arguments when reclaiming the throne not being able to use the illegitimacy of the Castilian monarch In addition was also received the papal dispensation for the marriage of Fernando IV with Constance of Portugal