The Assembly Hall of the Chaozhou Chinese Congregation (Tri?u Ch?u) was originally built in 1776. The small but historic town of Hoi An is located on the Thu Bon River 30km (18 miles) south of Danang. During the time of the Nguyen Lords (1558 - 1777) and even under the first Nguyen Emperors, Hoi An - then known as Faifo - was an important port, visited regularly by shipping from Europe and all over the East. By the late 19th Century the silting up of the Thu Bon River and the development of nearby Danang had combined to make Hoi An into a backwater. This obscurity saved the town from serious fighting during the wars with France and the USA, so that at the time of reunification in 1975 it was a forgotten and impoverished fishing port lost in a time warp.