Luis Antonio Argüello was the first Californio governor of Alta California, and the first to take office under Mexican rule. He was the only governor to serve under the First Mexican Empire and also s
Portrait of Luis Antonio Argüello held by the Huntington Library in San Marino, California
Rancho San Pablo was a 17,939-acre land grant in present-day Contra Costa County, California given in 1823 by Governor Luís Antonio Argüello to Francisco María Castro, a former soldier at the San Fran
Rancho San Pablo sign on San Pablo Avenue at or near the boundary between two counties, Alameda and Contra Costa