National Matriarch Linh Từ (Vietnamese: Linh Từ Quốc mẫu,ầnThị chữ Hán: 靈慈國母) Trần Thị Dung (1193[?]–1259) was the last empress and the last empress mother of the Lý dynasty. She was entitled by the Emperor Lý Huệ Tông as Empress Consort of the Lý dynasty from 1216 to 1225 before becoming Empress Mother of the Lý dynasty when her daughter Lý Phật Kim was enthroned as Lý Chiêu Hoàng in 1225. After Trần Thủ Độ, Trần Thị Dung's cousin, successfully overthrew the Lý dynasty and founded the Trần dynasty, Trần Thị Dung was downgraded to Princess Thiên Cực while her brother Trần Thừa's son became Trần Thái Tông, first emperor of the Trần dynasty. Before Lý Chiêu Hoàng, Trần Thị Dung had another daughter who eventually also became Empress Consort of the Trần dynasty, Empress Thuận Thiên.
The first husband of Trần Thị Dung, the former emperor Lý Huệ Tông, was killed in 1226 by order of Trần Thủ Độ, who afterwards married Trần Thị Dung, now Lady Linh Từ (:vi:Linh Từ quốc mẫu) . During the troubled times of the Early Trần dynasty with the revolt of Trần Liễu, son-in-law of Trần Thị Dung, and the first Mongol invasion of Đại Việt, she had a significant role in the reconciliation between Trần Thái Tông and his brother Trần Liễu, National Matriarch Linh Từ also had many activities to help the royal family during the Mongol invasion. After her death in 1259, Trần Thị Dung was posthumously entitled as National Matriarch Linh Từ (:vi:Linh Từ quốc mẫu). Trần Thị Dung's complicated biography was a fine example for the complex period of the Late Lý and Early Trần dynasty in the history of Vietnam.
History
Lý dynasty period
Trần Thị Dung was born in Lưu Gia village (now Hưng Hà, Thái Bình) as daughter of Trần Lý, leader of Trần clan who made their great fortune by fishing, and younger sister of Trần Thừa, the future first Retired Emperor of the Trần dynasty. During the troubled time under the reign of Lý Cao Tông, the Crown Prince Lý Sảm sought refuge in Trần Lý's family and decided to marry the beautiful Trần Thị Dung. Afterward, it was Trần clan who helped Lý Cao Tông and Lý Sảm restored the throne in Thăng Long, therefore the Emperor appointed several members of Trần clan for high positions in royal court such as Tô Trung Từ who was uncle of Trần Thị Dung, or Trần Tự Khánh who was Trần Thừa's younger brother. In 1211 the Crown Prince Lý Sảm was enthroned as Lý Huệ Tông after the death of Lý Cao Tông, by then Trần clan's position began to rise in royal court.
In February 1211, Trần Thị Dung was entitled as Royal Consort (Vietnamese: Nguyên phi) of the Lý dynasty but was downgraded to palace maid (ngự nữ) one year after because the Emperor suspected the military action of general Trần Tự Khánh who was Trần Thị Dung's brother. After the successful pacification of two revolts by Trần Tự Khánh, the Emperor decided to make Trần Thị Dung as Lady Thuận Trinh (Thuận Trinh phu nhân) but she was still distrusted by the Empress Mother Đàm who tried to force Trần Thị Dung commit suicide several times. Surviving with the protection from Lý Huệ Tông, Lady Thuận Trinh gave birth for him the first child in June 1216 who later became Princess Thuận Thiên, wife of Trần Thị Dung's nephew Trần Liễu. Finally, Trần Thị Dung was entitled as Empress of the Lý dynasty in December 1216 while his brothers Trần Thừa and Trần Tự Khánh were also appointed for the most important positions in royal court regarding both civil and military matters. In September 1218 Trần Thị Dung had a second daughter, Princess Chiêu Thánh.
Being ill for a long time, Lý Huệ Tông ultimately decided to cede the throne to his youngest daughter, the Princess Chiêu Thánh, now the Empress Regnant Lý Chiêu Hoàng in December 1224 and Trần Thị Dung thus became the Empress Mother of the Lý dynasty. Chiêu Hoàng was only six at that time so every important decisions in royal court were made by Trần clan, profiting this circumstance, general of royal guard Trần Thủ Độ, who was Trần Thị Dung's cousin, arranged a marriage between Chiêu Hoàng and Trần Cảnh, the eight-year-old son of Trần Thừa and nephew of Trần Thị Dung. With Trần Cảnh being the Empress's husband, Trần Thủ Độ was finally able to overthrow the Lý dynasty by making Lý Chiêu Hoàng pass the throne to Trần Cảnh, now Trần Thái Tông, in 1225. After the coronation of Trần Cảnh, Lý Chiêu Hoàng was demoted to Empress Chiêu Thánh (Chiêu Thánh công chúa) and his mother to Princess Thiên Cực (Thiên Cực công chúa).