Báhay na bató, also known in Visayan as baláy na bató or balay nga bato, is a traditional Philippine architectural style originating from the Spanish colonial period of the Philippines (1565–1898). It is an updated version of the traditional bahay kubo of the native Christianized lowlanders. Its design has evolved throughout the ages, but still maintains the bahay kubo's architectural basis which corresponds to the tropical climate, stormy season, and earthquake-prone environment of the whole archipelago of the Philippines and fuses it with the influence of Spanish colonizers and Chinese traders. Thus created was a hybrid of Austronesian, Spanish, and Chinese architecture, with American influence during the American era. Its most common appearance is that of an elevated, overhanging wooden upper-story Bahay kubo that stands on Spanish-style solid stone blocks or bricks and posts as foundation instead of just wood, bamboo stilts, or timber posts. Roofing is either Chinese tiled roof or thatch, of which many today are being replaced by galvanized or other modern roofing. Bahay na bato had a rectangular plan that reflected vernacular Austronesian Filipino traditional houses integrated with Spanish style. It followed the bahay kubo's arrangements such as open ventilation and elevated apartments used as living space with the ground floor used for storerooms, cellars, and other business purposes. Like bahay kubo, much of this ground level was reserved for storage; in business districts, some spaces were rented to shops. Horses for carriages were housed in stables called caballerizas.