The original small adobe on this site was built by Don Raimundo Olivas and his son, Nicolas, in 1837. The present structure was begun in 1847, with roof beams from the Santa Paula Canyon and tiles made from native soil. Don Raimundo lived in this adobe until his death on February 24, 1879. The last owner of this property was Major Max C. Fleischmann. Two hundred and fifty acres were given to the City of Ventura by the Fleischmann Foundation of Nevada in 1963 for public use.