The California Historical Landmarks program is a state initiative that identifies and preserves sites of historical significance throughout California. Established in 1931, the program aims to recognize locations that contribute to the understanding of the state's history, culture, and heritage. Each landmark is marked with a plaque that provides information about its historical importance. Landmarks can include a variety of sites, such as buildings, monuments, and archaeological sites. The program is managed by the California Office of Historic Preservation, which works to ensure that these sites are protected and maintained for future generations.