Huế originally rose to prominence as the capital of the Nguyễn lords, a feudal dynasty which dominated much of southern Vietnam from the 17th to the 19th century. In 1775 when Trịnh Sâm captured it, it was known as Phú Xuân. In 1802, Nguyễn Phúc Ánh (later Emperor Gia Long) succeeded in establishing his control over the whole of Vietnam, thereby making Huế the national capital.