Phú Xuân
Phú Xuân(富春) is a 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.
In 1306, the King of Champa Chế Mân offered Vietnam two Chăm prefectures, Ô and Lý, in exchange for marriage with a Vietnamese princess named Huyền Trân. The Vietnamese King Trần Anh Tông accepted this offer. He took and renamed Ô and Lý prefectures to Thuận prefecture and Hóa prefecture, respectively, with both of them often referred to as Thuận Hóa region.
In 1592, the Mạc Dynasty was forced to flee to Cao Bằng and the Lê kings were enthroned as de jure Vietnamese rulers under the leadership of Nguyễn Kim, the leader of Lê Dynasty loyalists. Later, Kim was poisoned by a Mạc Dynasty general which paved the way for his son-in-law, Trịnh Kiểm, to take over the leadership. Kim's eldest son, Nguyễn Uông, was also assassinated in order to secure Trịnh Kiểm's authority.Nguyễn Hoàng, another son of Nguyễn Kim, feared a fate like Nguyễn Uông's so he pretended to have mental illness. He asked his sister Ngoc Bao, who was a wife of Trịnh Kiểm, to entreat Kiểm to let Hoàng govern Thuận Hóa, the furthest south region of Vietnam at that time.