When was Chinatown first built?

Chinatown in San Francisco, the most famous Chinatown in the United States, was established in the mid-19th century, with its origins dating back to the 1840s. It began to take shape after the California Gold Rush in 1849, as Chinese immigrants settled in the area. The neighborhood was significantly developed and expanded following the construction of the first buildings in the 1850s, particularly after the 1906 earthquake, which led to a rebuilding of the community. Other Chinatowns across the world have similar histories, often emerging during periods of Immigration and settlement.