The port city of Hội An and its bridge within the 18th century. Watercolour engraving by Jacques Chereau (1688–1776), circa 1750. Historical maps from the seventeenth and 18th centuries demonstrate Hội An about the northern financial institution, linked to The ocean by means of the Đại Chiêm Estuary and linked to Đà Nẵng's Đại Estu