Trần Thủ Độ
After the coronation of Trần Cảnh, now Trần Thái Tông, Lý Chiêu Hoàng was downgraded to Empress Consort Chiêu Thánh (Chiêu Thánh hoàng hậu) in January 1226. Although Trần Thừa, father of the new emperor, acted as Regent in the royal court, it was the grand chancellor Trần Thủ Độ who held absolute power in the court and decided both military and civil matters of the country. Still afraid that the newly founded rule of the Trần Dynasty might be overthrown by its political opponents, Trần Thủ Độ continued to eliminate members of the Lý royal family by his ruthless method. The grand chancellor ordered Lý Chiêu Hoàng's father, Lý Huệ Tông, to commit suicide on 8 October of Lunar calendar 1226 while married her mother Empress Trần Thị Dung, now Princess Thiên Cực. These actions of Trần Thủ Độ were criticized by Ngô Sĩ Liên in his "Đại Việt sử kí toàn thư" as an inhumane decision, despite his initial motive of reinforcing the reign of Trần Thái Tông. Not satisfied with the death of Huệ Tông, Trần Thủ Độ decided to kill off all members of the Lý royal family in August 1232 during the death anniversary of Lý emperors held in Thái Đường, Hoa Lâm (now Nam Trực, Nam Định). However, the authenticity of this event was challenged by the historian Ngô Sĩ Liên because a member of the Lý clan was still appointed as general by Trần Anh Tông and there was no account of this event in Phan Phu Tiên's historical record.