塘中
During the 17th century and almost all the 18th century, Đàng Trong was a de facto independent kingdom ruled by the Nguyễn lords while they claimed to be loyal subjects of the Lê emperors in Thăng Long (Hanoi). It was bordered by Đàng Ngoài along the Linh River (modern Gianh River in Quảng Bình Province). Nguyễn rulers titled themselves as "Chúa" ("Lord") instead of "Vua" or King until Lord Nguyễn Phúc Khoát claimed the title "Vũ Vương" ("Martial King") in 1774. The country did not have an official name (""), foreigners often called the kingdom "Quảng Nam Quốc" (), after the Quảng Nam Governorate where the important harbor Hội An (Faifo) located.