Jose Manuel Gonzales was an Apache Indian who, along with his wife and five children, traveled to California with the Spanish Anza expedition in 1776. The following year he became one of the founders of the Pueblo de San Jose de Guadalupe, the first municipal government in California. His first home proved untenable; winter flooding drove the family to higher ground. This second house, the one that still stands, was built in 1797 on a site that the floodwaters could not reach. Gonzales lived here until his death in 1804, and for those seven years the adobe served as both family home and a piece of the pueblo's civic fabric. That a man who had walked from Sonora to the Santa Clara Valley with the Anza Party would build something durable enough to last 229 years says something about the kind of permanence he was seeking.

After Gonzales died, the adobe passed in 1808 to Luis Maria Peralta, whose name it carries today. Peralta was a sergeant in the Spanish Army, a commissioner of the Pueblo of San Jose, and the owner of Rancho San Antonio, one of the largest land grants in Alta California, encompassing much of what is now the East Bay. The man who held title to the hills of Oakland, Berkeley, and Alameda lived in a modest two-room adobe in downtown San Jose. He divided the house into its current layout, added a porch, a kitchen, and a chimney, and made it his home for more than four decades. When Peralta died in August 1851, just a year after California became a state, he left the adobe to his two daughters. The rancho lands would soon be lost to squatters and legal disputes in the turbulent years of early American California, but the little house on San Pedro Square endured.

Today the Peralta Adobe operates as a historic house museum, available for tours by appointment through the nonprofit History San Jose. The building measures just 20 feet by 41 feet, a modest footprint that contains two connecting rooms of approximately equal size. Step inside and the furnishings recreate life as it might have looked two centuries ago: simple furniture, cooking implements, the textures of daily existence in colonial California. Outside stands an horno, an outdoor fireplace oven of the kind that would have produced bread and roasted meat for the household. Across the street, the Thomas and Carmel Fallon House, built in 1855 in the Victorian style, provides a striking counterpoint. Together the two buildings form the Peralta Adobe and Fallon House Historic Site, where visitors can walk from Spanish colonial life to American-era California in the space of a single block.

San Pedro Square today is one of downtown San Jose's liveliest spots, ringed by restaurants, bars, and a popular open-air market. Tech workers from nearby offices fill the patios at lunch. The contrast between the oldest building in San Jose and the gleaming towers of its newest economy could not be sharper, yet the adobe does not feel out of place. It feels like an anchor. The California Historical Landmark plaque on its wall marks dates and names, but the building itself makes a quieter argument: that this valley had a long and layered history before the first semiconductor was fabricated. Gonzales walked here from Sonora. Peralta rode out from the presidio. Their adobe, with its hand-formed blocks and thick earthen walls, is not a replica or a reconstruction. It is the thing itself, still standing, still open, still telling the story of how San Jose began.