The Trịnh Lords were a powerful feudal family in Vietnam during the 16th to 18th centuries. They ruled the northern region of Vietnam, particularly around the capital, Hanoi, while the Nguyễn Lords controlled the south. The Trịnh Lords were known for their military strength and political influence, often engaging in conflicts with the Nguyễn Lords and the Mạc Dynasty. The Trịnh Lords played a significant role in the development of Vietnamese culture and governance. They promoted Confucianism and supported the arts, leading to a flourishing of literature and education. Their rule ended in the late 18th century when the Tây Sơn Rebellion challenged their authority, leading to significant changes in Vietnam's political landscape.