Lê Thị Ngọc Bình was a Vietnamese princess, youngest daughter of king Lê Hiển Tông

Lê Hiển Tông

Lê Hiển Tông , born Lê Duy Hiệu, was the second-last king of Vietnamese Lê Dynasty. He reigned from 1740 to 1786 and was succeeded by his grandson Lê Duy Kỳ.-References:...

 of Lê Dynasty. Her early life was unknown, when the Tây Sơn Dynasty

Tây Son Dynasty

The name of Tây Sơn is used in many ways to refer to the period of peasant rebellions and decentralized dynasties established between the eras of the Later Lê and Nguyễn dynasties in the history of Vietnam between 1770 and 1802...

 succeeded Lê Dynasty

Lê Dynasty

The Later Lê Dynasty , sometimes referred to as the Lê Dynasty was the longest-ruling dynasty of Vietnam, ruling the country from 1428 to 1788, with a brief interruption....

 as the official dynasty of Vietnam; Emperor Quang Trung ordered his Crown Prince Nguyễn Quang Toản (later Emperor Cảnh Thịnh) to marry her.

In 1801, Nguyễn Ánh's force, main rival of Tây Sơn, captured Phú Xuân

Phú Xuân

Phú Xuân is an historic place in Huế, Vietnam. It was the capital of the Nguyễn Lords, the Tây Sơn Dynasty, and later became a part of the Nguyễn Dynasty’s capital in Huế....

 and forced Cảnh Thịnh flee to Tonkin

Tonkin

Tonkin , also spelled Tongkin, Tonquin or Tongking, is the northernmost part of Vietnam, south of China's Yunnan and Guangxi Provinces, east of northern Laos, and west of the Gulf of Tonkin. Locally, it is known as Bắc Kỳ, meaning "Northern Region"...

 and left Lê Thị Ngọc Bình and his wives behind. Nguyễn Ánh captured but did not threaten Lê Thị Ngọc Bình; then Anh married her regardless of dissuasions of his followers.

Later, Nguyễn Ánh became Emperor Gia Long

Gia Long

Emperor Gia Long , born Nguyễn Phúc Ánh , was an emperor of Vietnam...

 and gave her the royal title Đệ Tam Cung (roughly Third Wife or Third Empress). Bình had with emperor Gia Long four children: prince Nguyen Phuc Quan, prince Nguyen Phuc Cu, princess An Nghia Ngoc Ngon, and princess My Khue Ngoc Khue.

Le Thi Ngoc Binh died in 1810 and was buried in Trúc Lâm, Thừa Thiên Huế.