Hoi An Ancient Town is an exceptionally well-preserved example of a South-East Asian trading port dating from the 15th to the 19th century. Its buildings and its street plan reflect the influences, both indigenous and foreign, that have combined to produce this unique. From the 1600s to the 1800s, Hoi An was a major trading outpost known as Faifo. However, when the river silted up and the harbor became too shallow, trade moved north to Da Nang – and Hoi An lost its significance. Today, this cosmopolitan heritage is reflected in its mix of Japanese, Chinese, and Vietnamese influences. Because of its rich blend of aesthetics, the entire old city is a UNESCO World Heritage Site.