History of retail in Southern California
Retail in Southern California dates back to its first dry goods store that Jonathan Temple opened in 1827 on Calle Principal (Main Street), when Los Angeles was still a Mexican village. After the American conquest, as the pueblo grew into a small town surpassing 4,000 population in 1860, dry goods stores continued to open, including the forerunners of what would be local chains.
Source: Wikipedia — History of retail in Southern California (CC BY-SA 4.0)