Wat architecture adheres to consistent principles. A wat, with few exceptions, consists of two parts: the Phutthawat and the Sangkhawat.
Phutthawat
The Phutthawat is the area which is dedicated to Buddha. It generally contains several buildings:
Chedi – also known as a Stupa it is mostly in the form of a bell-shaped tower, often accessible and covered with gold leaf, containing a relic chamber.
Mondop - specific square- or cruciform-based building or shrine, sometimes with a spired roof. It is a ceremonial form that can be appear on different kinds of buildings. It can house relics, sacred scriptures or act as a shrine. Unlike the Mandapa of Khmer or Indian temple, which are part of a larger structure, the Thai Mondop is free-standing.
Ho trai – the temple library or scriptures depository houses the sacred Tipiṭaka scriptures. Sometimes they are built in the form of a Mondop, a cubical-shaped building where the pyramidal roof is carried by columns.
Sala – an open pavilion providing shade and a place to rest.
Sala kan parian – a large, open hall where laitycan hear sermons or receive religious education. It literally means "hall, in which monks study for their Parian exam" and is used for chanting afternoon prayers.
Ho rakhang – bell tower that is used for waking the monks and to announce the morning and evening ceremonies.
Phra rabiang – a peristyle sometimes built around the sacred inner area as a cloister.
Ancillary buildings such as a crematorium or a school.
The buildings are often adorned with elements such as chofas. In temples of the Rattanakosin era, such as Wat Pho and Wat Ratchabophit, the ubosot can be contained within a inner wall called a Kamphaeng Kaeo, which translates to "crystal wall".
Sangkhawat
The sangkhawat contains the monks' living quarters. It lies within the wall surrounding the temple compound. The sangkhawat can have the following buildings:
Kuti – originally a small structure, built on stilts, designed to house a monk, with its proper size defined in the Sangkhathiset, rule 6, to be 12 by 7 kheup. Modern kutis take the shape of an apartment building with small rooms.
The sangkhawat can contain the 'Ho rakhang' and even the 'Sala Kan Parian'.
Houses most of the functional buildings such as the kitchen.
Temple elements
Roof forms
Temples display multiple roof tiers. The use of ornamented tiers is reserved for roofs on temples, palaces and important public buildings. Two or three tiers are most often used, but some royal temples have four. The practice is more aesthetic than functional. Temple halls and their roofs are large. To lighten the roof's appearance, the lowest tier is the largest with a smaller middle layer and the smallest tier on top. Multiple breaks in each roof lighten it further – a double-tiered roof might have 2-4 breaks in each tier. The tiers, breaks and tier patterns create dynamic visual rhythms. In northern temples, the roof area is larger, sweeping low to cover more of the wall. The lower tiers telescope toward the entrance. In a central Thai temple, the lower tiers reach a short distance beyond the top roof at the gable ends.
Roof finials
Most decorations are attached to the bargeboard, the long, thin panel on the edge of the roof at the gable ends. The decorative structure is called the lamyong. The lamyong is sculpted in an undulating, serpentine nag sadung shape evoking the Nāga. Its blade-like projection called bai raka suggest both Nāga fins and the feathers of Garuda. Its lower finial is called a hang hong, which usually takes the form of a Nāga's head turned up and facing away from the roof. The Nāga head may be styled in flame-like kranok motifs and may have multiple heads. A roof with multiple breaks or tiers has identical hang hong finials at the bottom of each section. Perched on the peak of the lamyong is the large curving ornament called a Chofah, which resembles the beak of a bird, perhaps representing Garuda.
Popular temple icons
Thai Theravada Buddhism and Hindu cultures merged, and Hindu elements were introduced into Thai iconography. Popular figures include the four-armed figure of Vishnu; the garuda ; the eight-armed Shiva; elephant-headed Ganesh; the Nāga, which appears as a snake, dragon or cobra; and the ghost-banishing giant Yaksha.
