Lý Chiêu Hoàng
Succeeding to the throne at the age of only six, Lý Chiêu Hoàng ruled under the total influence of Commander of Royal Guard Trần Thủ Độ and other members of the Trần clan, who began to take over power in the royal court during the reign of Lý Huệ Tông. Even the Empress Regnant's servants were chosen by Trần Thủ Độ, so that trusted servants of Lý Chiêu Hoàng all came from the Trần clan, such as Trần Bất Cập, Trần Thiêm or Trần Thủ Độ's 7-year-old nephew Trần Cảnh. When Trần Cảnh informed Trần Thủ Độ that the Empress Regnant seemed to have affection towards him, the leader of the Trần clan immediately decided to use this chance to carry out his plot of overthrowing the Lý Dynasty and founding his clan's own dynasty. Firstly Trần Thủ Độ moved the whole Trần clan to the royal palace and arranged a secret marriage between Lý Chiêu Hoàng and Trần Cảnh there, without the appearance of any mandarin or member of the Lý royal family. The royal marriage took place in October or November 1225, when Lý Chiêu Hoàng and Trần Cảnh were both only 7 years old. After that, he announced the fait accompli to the royal court and made Lý Chiêu Hoàng cede the throne to her newly married husband for the reason that she was not capable for the position, so Trần Cảnh was chosen as her successor. Hence, the 216-year reign of the Lý Dynasty was ended and the new Trần Dynasty was created on the first day of the twelfth lunar month, 1225 (31 December 1225). The only era name of the Empress Regnant was Thiên Chương Hữu Đạo (天彰有道).