<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The history of the city of San Francisco, California, and its development as a center of maritime trade, were shaped by its location at the entrance to a large natural harbor . San Francisco is the name of both the city and the county; the two share the same boundaries . Starting overnight as the base for the gold rush of 1849, the city quickly became the largest and most important population, commercial, naval, and financial center in the American West . San Francisco was devastated by a great earthquake and fire in 1906 but was quickly rebuilt . The San Francisco Federal Reserve Branch opened in 1914, and the city continued to develop as a major business city throughout the first half of the 20th century . Starting in the latter half of the 1960s, San Francisco became the city most famous for the hippie movement . In recent decades, San Francisco has become an important center of finance and technology . The high demand for housing, driven by its proximity to Silicon Valley, and the low supply of available housing has led to the city being one of America's most expensive places to live . San Francisco is currently ranked ninth on the Global Financial Centres Index . </P> <P> The earliest evidence of human habitation in what is now the city of San Francisco dates to 3000 BC . Native Americans who settled in this region found the bay to be a resource for hunting and gathering, leading to the establishment of many small villages . Collectively, these early Native Americans are now known as the Ohlone, and the language they spoke belonged to the Miwok family . Their trade patterns included places as far away as Baja California, the Mojave Desert and Yosemite . </P> <P> The earliest Europeans to reach the site of San Francisco were a Spanish exploratory party in 1769, led overland from Mexico by Don Gaspar de Portolà and Fra . Juan Crespi . The Spanish recognized the location, with its large natural harbor, to be of great strategic significance . A subsequent expedition, led by Juan Bautista de Anza, selected sites for military and religious settlements in 1774 . The Presidio of San Francisco was established for the military, while Mission San Francisco de Asís began the cultural and religious conversion of some 10,000 Ohlone who lived in the area . The mission became known as Mission Dolores, because of its nearness to a creek named after Our Lady of Sorrows . </P>

When did humans begin to live in san francisco