Austronesian peoples
Architecture

Austronesian architecture is diverse but often shares certain characteristics that indicate a common origin. The reconstructed Proto-Austronesian and Proto-Malayo-Polynesian forms of various terms for "house", "building", or " granary " among the different linguistic subgroups of Austronesians include *rumaq ("house"); *balay ("public building", "community house", or "guest house"); *lepaw ("hut", "field hut", or "granary"); *kamaliR ("bachelor's house", or "men's house"); and *banua ("inhabited land", or "community territory").

Austronesian structures commonly have raised floors. The structures are raised on piles, usually with space underneath also utilized for storage or domestic animals. The raised design has multiple advantages, including mitigating damage during flooding and (in very tall examples) acting as defensive structures during conflicts. The house posts are also distinctively capped with larger-diameter discs at the top, to prevent vermin and pests from entering the structures by climbing them. Austronesian houses and other structures are usually built in wetlands and alongside bodies of water but can also be constructed in the highlands or even directly on shallow water.

Building structures on pilings is believed to be derived from the design of raised granaries and storehouses, which are highly important status symbols among the ancestrally rice-cultivating Austronesians. The rice granary shrine was also the archetypal religious building among Austronesian cultures and was used to store carvings of ancestor spirits and local deities.

Another common feature are pitched roofs with ornamented gables. The most notable of these are saddlebacked roofs, a design common for longhouses used for village meetings or ceremonies. The overall effect of this is reminiscent of a boat, underlining the strong maritime connections of Austronesian cultures. The boat motif is common throughout, particularly in Eastern Indonesia. In some ethnic groups, the houses are built on platforms that resemble catamarans. Among the Nage people, a woven representation of a boat is added to the ridge of the roof; among the Manggarai people, the roofs of houses are shaped like an upside-down boat; while among the people of Tanimbar and eastern Flores, the ridge itself is carved into a representation of a boat. Furthermore, elements of Austronesian structures (as well as society in general) are often referred to in terminologies used for boats and sailing. These include calling elements of structures "masts", "sails", or "rudders", or calling the village leaders "captains" or "steersmen". In the case of the Philippines, the villages themselves are referred to as barangay, from an alternate form of balangay, a type of sailboat used for trading and colonization.

Austronesian buildings have spiritual significance, often containing what has been coined by anthropologist James J. Fox as a "ritual attractor". These are specific posts, beams, platforms, altars, and so on that embody the house as a whole, usually consecrated at the time of building.

The Austronesian house itself also often symbolizes various aspects of indigenous Austronesian cosmology and animism. In the majority of cases, the loft of the house (usually placed above the hearth), is considered to be the domain of deities and spirits. It is essentially a raised granary built into the structure of the house itself and functioning as a second floor. It is commonly used to store sacred objects (like effigies of granary idols or deceased ancestors), heirlooms, and other important objects. These areas are usually not part of the regular living space and may only be accessible to certain members of the family or after performing a specific ritual. Other parts of the house may also be associated with certain deities, and thus certain activities like receiving guests or conducting marriage ceremonies can only be performed in specific areas.

While rice cultivation wasn't among the technologies carried into Remote Oceania, raised storehouses still survived. The pataka of the Māori people is an example. The largest pataka are elaborately adorned with carvings and are often the tallest buildings in the Māori pā. These were used to store implements, weapons, ships, and other valuables; while smaller pataka were used to store provisions. A special type of pataka, supported by a single tall post, also had ritual importance and was used to isolate high-born children during their training for leadership.

The majority of Austronesian structures are not permanent. They are made from perishable materials like wood, bamboo, plant fibre, and leaves. Similar to traditional Austronesian boats, they do not use nails but are traditionally constructed solely by joints, weaving, ties, and dowels. Elements of the structures are repaired and replaced regularly or as they get damaged. Because of this, archaeological records of prehistoric Austronesian structures are usually limited to traces of house posts, with no way of determining the original building plans.

Indirect evidence of traditional Austronesian architecture, however, can be gleaned from their contemporary representations in art, such as friezes on the walls of later Hindu-Buddhist stone temples (like in reliefs at Borobudur and Prambanan). But these are limited to the recent centuries. They can also be reconstructed linguistically from shared terms for architectural elements, like ridge poles, thatch, rafters, house posts, hearths, notched log ladders, storage racks, public buildings, and so on. Linguistic evidence also makes it clear that stilt houses were already present among Austronesian groups since at least the Late Neolithic.

In modern Indonesia, varying styles are collectively known as rumah adat.

Arbi et al. (2013) have also noted the striking similarities between Austronesian architecture and Japanese traditional raised architecture (shinmei-zukuri). Particularly the buildings of the Ise Grand Shrine, which contrast with the pit-houses typical of the Neolithic Yayoi period. They propose significant Neolithic contact between the people of southern Japan and Austronesians or pre-Austronesians that occurred prior to the spread of Han Chinese cultural influence to the islands. Rice cultivation is also believed to have been introduced to Japan from a para-Austronesian group from coastal eastern China. Waterson (2009) has also argued that the architectural tradition of stilt houses is originally Austronesian and that similar building traditions in Japan and mainland Asia (notably among Kra-Dai and Austroasiatic -speaking groups) correspond to contacts with a prehistoric Austronesian network.
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