The villages and hamlets before the 10th century, appeared in this period according to several tales of Linh Nam. The ancient Vietnamese used wood to build houses to protect themselves from tigers and wolves. Two kinds of houses were depicted on the bronze drums; one in the shape of a boat and the other in a shape similar to a turtle shell. Due to dense lakes, swamps, rivers, and highly humid tropical climate, the most appropriate building material is bamboo and wood to set up houses on low stilts. At the end of the 19th century, houses on stilts remained in mountainous areas, midlands, and plains throughout the country.