Lý Anh Tông is enthroned as emperor of Vietnam at the age of two, beginning a 37-year reign.

Emperor Lý Anh Tông of Đại Việt was the sixth emperor of the later Lý dynasty in Vietnamese history, from 1138 until his death in 1175. Since Lý Anh Tông, given name Lý Thiên Tộ, was chosen as the successor of his father Lý Thần Tông at the age of only two, the early period of his reign witnessed the dominant position of Đỗ Anh Vũ in the royal court until he died in 1157; afterwards, the Emperor ruled the country with the assistance of a prominent official named Tô Hiến Thành. The reign of Lý Anh Tông was considered the last relatively stable period of the Lý dynasty before the turbulence during the reign of Lý Cao Tông.

Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about 331,000 square kilometres (128,000 sq mi) and a population of over 100 million, making it the world's fifteenth-most populous country. One of two communist states in Southeast Asia, Vietnam shares land borders with China to the north, and Laos and Cambodia to the west. Its capital is Hanoi and its largest city is Ho Chi Minh City.