Trần Thánh Tông
Returning to the capital Thăng Long, Trần Thái Tông decided to cede the throne to Crown Prince Trần Hoảng, now Trần Thánh Tông, on the 24th day of the second lunar month (March 30), 1258. After the coronation, Thánh Tông changed the era name to Thiệu Long (; 1258–1272). During his reign, the Emperor had one more era name, Bảo Phù (; 1273–1278). Although passing the throne to his son, Thái Tông continued to rule the country with Thánh Tông in the position of retired emperor from 1259 to his death in 1277.