In 1258, Thái Tông decided to remarry Princess Chiêu Thánh to the general Lê Phụ Trần because he had an essential role in the victory of Đại Việt over the first Mongol invasion. This event was one more time criticized in historical books for the lack of moral code in marriage during the Early Trần period. Princess Chiêu Thánh died in Cổ Pháp in March 1278 at the age of 61. With the second husband Lê Phụ Trần, she had two children, Marquis Lê Tông and Princess Ứng Thụy Lê Khuê.