Before it was Hội An, it was Faifo — a Cham trading settlement at the mouth of the Thu Bồn River, 28 kilometers south of what would eventually become Da Nang. The Cham people understood the geography: a river mouth, a natural harbor, a location where ships could shelter and exchange cargo. Under Champa rule, the settlement became one of the kingdom's key ports, an essential stop on the maritime Silk Road that linked China, India, the Persian Gulf, and the islands of Southeast Asia. Ancient Cham wells still exist in Hội An today, along with the archaeological site of Trảng Sỏi 1 — physical evidence of the civilization that first recognized what this bend of river could become. When Vietnamese settlers began arriving from the late 15th century onward, allowing the Nguyễn clan to extend its control southward, the port's reputation was already established. They inherited a working city.

By the start of the 17th century, Hội An had attracted something unusual: stable, prosperous foreign communities willing to put down roots rather than simply trade and leave. Japanese merchants established an enclave on the western side of the main canal. Chinese merchants — arriving from Fujian, Guangdong, and other coastal provinces — built their assembly halls and clan houses on the other side. The two communities were separated by water and connected by commerce. In 1593, Japanese merchants began building a covered bridge across the canal to improve access between the two enclaves. They completed it in 1595. The bridge was immediately practical and eventually sacred: in 1653, residents added a temple on top of it, dedicated to Trấn Vũ (Bắc Đế Trấn Vũ), a Taoist deity believed to control natural disasters. The resulting structure — 18 meters long, with a wooden frame and a temple perched above — became the Old Town's defining landmark. Lord Nguyễn Phúc Chu gave it the name Lai Viễn Kiều during a visit in 1719: "a bridge to welcome guests from afar."

What makes Hội An extraordinary is not just what it contains but what it didn't lose. The Old Town maintained its original street plan through five centuries of political change — Cham rule, Vietnamese settlement, Chinese and Japanese immigration, French colonial administration, and the convulsions of the 20th century. When the trading ships stopped arriving in the 19th century as larger vessels shifted to deeper ports, Hội An's economy declined. But the decline that would have prompted demolition and redevelopment elsewhere instead left the Old Town intact. The 1,360 monuments and heritage sites documented today — including 1,068 preserved houses — survived because no one could afford to replace them. The Chinese-style assembly halls, with their incense smoke and carved wooden screens; the Japanese-influenced merchants' houses with their inner courtyards open to the sky; the French colonial buildings on the waterfront: all of them stayed. The architecture became the heritage before anyone used that word to describe it.

On 12 December 1999, UNESCO inscribed Hội An Ancient Town as a World Heritage Site, recognizing it as an exceptionally well-preserved example of a Southeast Asian trading port. The designation confirmed what the Old Town already was, but it also changed it. Tourism arrived in force. The yellow walls that had been peeling became freshly painted. The lantern-lit streets that had been quiet filled with visitors every evening. The tension between preservation and tourism — between the living community that still inhabits the Old Town and the heritage site that now surrounds them — is ongoing. Residents still live in houses their families have occupied for generations, conducting the ordinary business of daily life within walls that were built for merchants from three nations. The Thu Bồn River still runs past the Old Town's waterfront, as it did when Cham traders first recognized what a river mouth could offer. The street plan those traders laid out, which survived Cham rule and Vietnamese rule and French rule and the 20th century, is still the street plan you walk today.