in its 332 hectares has 5817 properties of which 500 are categorized as heritage properties, generally have been built in the nineteenth century, on the site of earlier colonial buildings destroyed by the earthquake of 1868. the houses, usually made in ashlar, are characterized by semi-circular arches and vaulted ceilings. ashlar structures always have thick walls: 1 to 1.5 meters for rooms, 2 meters for churches. through the use of lime mortar, the walls are shown homogeneous image that is reinforced with brick vaults or ashlar that are justified in the rarity of the wood.