Chapter 01 · ORIGIN
From Cham frontier to imperial capital
In 1306, Champa ceded Ô and Lý to Đại Việt after King Chế Mân married Princess Huyền Trân. Nguyễn Hoàng arrived in Thuận Hóa in 1558, and his successors turned Phú Xuân into their power base. When Gia Long unified Vietnam in 1802, Huế became the Nguyễn imperial capital.