A historic reproduction of the city's Mexican era is designated as a California State Landmark (No.512): the Alvarado Adobe, originally constructed in 1842 by one of Francisco Castro's sons, Jesús María Castro, for his mother, Gabriéla Berryessa de Castro. Upon Gabriéla's death in 1851, it was inherited by her daughter, Martina Castro de Alvarado, wife of Juan Bautista Alvarado, who was Governor of California from 1836 to 1842. The Alvarado Adobe was demolished in the mid-20th century to make way for a motel. A reproduction was built later in the century which is located in the San Pablo Civic Center on the northwest corner of San Pablo Avenue and Church Lane. A single beam from the original structure is incorporated into the roof of the replacement structure, at the rear of the adobe facing the interior courtyard.