Lý Thần Tông (1116–1138), personal name Lý Dương Hoán, was the fifth monarch of the Lý Dynasty, reigning over Đại Việt from 1127 to his death in 1138. Becoming the ruler of Đại Việt at the age of twelve, Lý Thần Tông successfully maintained the order of the royal court and strengthened the stability of the country with the assistance of capable officials. For that reason, Đại Việt under Lý Thần Tông was able to witness a peaceful period like during the reign of his predecessors. However, Lý Thần Tông died at age 23 before passing the throne to his crown prince Lý Thiên Tộ.