they are Jepara in Central Java and Bali. Mas village near Ubud in Bali is renowned for its wood carving art. Balinese woodcarving today has a sustained tourist market in Bali. In Papua, Asmat art consists of elaborate stylized wood carvings such as the bisj pole and is designed to honour ancestors. Many Asmat artefacts have been collected by the world's museums, among the most notable of which are those found in the Michael C. Rockefeller Collection at the Metropolitan Museum of Art in New York City and the Tropenmuseum in Amsterdam. Bisj poles are carved by Asmat religious carvers (wow-ipits) after a member of their tribe or community had been killed and headhunted by an enemy tribe. Carved out of a single piece of a wild mangrove tree, Bisj poles can reach heights of up to 25 feet (7.62 m). Their carvings depict human figures standing on top of each other, as well as animal figures, phallic symbols, and carvings in the shape of a canoe prow. The Asmat participated in headhunting raids and cannibalism as rituals, many rituals involved the Bisj poles, including dancing, masquerading, singing and headhunting—all performed by men. In North Sumatra, the people of Nias placed great value on wooden figures or adu. The sole purpose of the Nias figures was to fulfil ritual needs, whether it is to ensure wealth or to perform specific beneficial rite. Niassan figures vary in size, from as small as 20 centimetres (7.9 in) in height to more than 2 metres (6.6 ft) tall. When an elderly person died, the family would make a wooden statue known as adu zatua. The statue was unveiled on the fourth day after the death of the person. The shape of the wooden statue reflects the status of the person who used them: the more powerful the owner, the more impressive the statue will be made. Nias people believed that the deceased person's spirits reside in the statue, so all events that occurred in the family were shared with the ancestor statues through prayers. Ancestor statues were placed in the main room of the house, sometimes more than a hundred. A missionary work in 1930 had recorded the removal of 'over 2000 "idols" from a house of new northern convert.' Some missionaries even recorded houses collapsing under the weight of these ancestor figures. Small adu zatua were bound together horizontally using a rattan