He next added a smaller two-story brick building to the south end of the old wooden structure, approximately 17' by 35' large. These extended several feet off each side of the old building. Gibson built around the original building instead of demolishing and rebuilding on the same plot. He incorporated the initial house into the additions. It is visible today only upon a structural inspection, mainly seen in the difference in wall thickness. The initial building's exterior walls, which were thicker than the interior walls, are visible in the doorways between the dining room and kitchen. The 1976 National Register of Historic Places assessment identified the style of the main brick structure as modified Georgian revival due to its massing, hipped roof, and floor plan consisting of a central hallway with two rooms off to each side, each having a fireplace on the outside wall, and four bedrooms upstairs. However, Georgian style was popular in California around 1830, which is far outside of the Gibson House's construction period. A more appropriate style would be Italianate, which was popular from 1840 to 1885 and fits the house's style and construction period. Italianate An 1879 lithograph reflects features consistent with Italianate style. Italianate style began in England as part of the Picturesque movement. The movement responded to the formal classical ideals in art and architecture that had been fashionable for the last 200 years. It emphasized the features seen in informal Italian farmhouses, such as their square towers. In the United States, the style took on regional characteristics. In general, the style can be identified by multiple stories, a low-pitched hipped roof, and often a polygonal or square cupola placed on the roof. Other Italianate features visible on the present property include the balustraded balcony, tall double-hung windows with hood moulds, and the paneled front door with a decorative entablature and pilasters. The original square cupola was removed during the Neoclassical remodel, done between 1890 and 1900. Neoclassical Neoclassical style rose in popularity from 1895 to 1955. The interest in classical architecture can be attributed to the World's Columbian Exposition, held in Chicago in 1893. The planners emphasized a classical theme, and the central court consisted of colonnaded buildings designed by some of the periods best known architects. The fair was widely attended and documented, with photos of the exhibits shared throughout the country. The monumental sized buildings influenced the construction of