The Bagan Archaeological Zone, defined as the 13 x 8 km area centred around Old Bagan, consisting of Nyaung U in the north and New Bagan in the south,lies in the vast expanse of plains in Upper Burma on the bend of the Irrawaddy river. It is located 290 kilometres (180 mi) south-west of Mandalay and 700 kilometres (430 mi) north of Yangon. Its coordinates are 21°10' North and 94°52' East. Bagan lies in the middle of the "dry zone" of Burma, the region roughly between Shwebo in the north and Pyay in the south. Unlike the coastal regions of the country, which receive annual monsoon rainfalls exceeding 2500 mm, the dry zone gets little precipitation as it is sheltered from the rain by the Rakhine Yoma mountain range in the west.
Bagan stands out for not only the sheer number of religious edifices of Myanmar but also the magnificent architecture of the buildings, and their contribution to Burmese temple design. The artistry of the architecture of pagodas in Bagan proves the achievement of Myanmar craftsmen in handicrafts. The Bagan temple falls into one of two broad categories: the stupa-style solid temple and the gu-style (ဂူ) hollow temple.
A stupa, also called a pagoda, is a massive structure, typically with a relic chamber inside. The Bagan stupas or pagodas evolved from earlier Pyu designs, which in turn were based on the stupa designs of the Andhra region, particularly Amaravati and Nagarjunakonda in present-day south-eastern India, and to a smaller extent to Ceylon.The Bagan-era stupas in turn were the prototypes for later Burmese stupas in terms of symbolism, form and design, building techniques and even materials.
Originally, a Ceylonese stupa had a hemispheric body (Pali: anda "the egg"), on which a rectangular box surrounded by a stone balustrade (harmika) was set. Extending up from the top of the stupa was a shaft supporting several ceremonial umbrellas. The stupa is a representation of the Buddhist cosmos: its shape symbolizes Mount Meru while the umbrella mounted on the brickwork represents the world's axis.The brickwork pediment was often covered in stucco and decorated in relief. Pairs or series of ogres as guardian figures ('bilu') were a favourite theme in the Bagan period.
The original Indic design was gradually modified first by the Pyu, and then by Burmans at Bagan where the stupa gradually developed a longer, cylindrical form. The earliest Bagan stupas such as the Bupaya (c. 9th century) were the direct descendants of the Pyu style at Sri Ksetra. By the 11th century, the stupa had developed into a more bell-shaped form in which the parasols morphed into a series of increasingly smaller rings placed on one top of the other, rising to a point. On top the rings, the new design replaced the harmika with a lotus bud. The lotus bud design then evolved into the "banana bud", which forms the extended apex of most Burmese pagodas. Three or four rectangular terraces served as the base for a pagoda, often with a gallery of terra-cotta tiles depicting Buddhist jataka stories. The Shwezigon Pagoda and the Shwesandaw Pagoda are the earliest examples of this type.[22] Examples of the trend toward a more bell-shaped design gradually gained primacy as seen in the Dhammayazika Pagoda (late 12th century) and the Mingalazedi Pagoda (late 13th century).
Hollow temples
In contrast to the stupas, the hollow gu-style temple is a structure used for meditation, devotional worship of the Buddha and other Buddhist rituals. The gu temples come in two basic styles: "one-face" design and "four-face" design—essentially one main entrance and four main entrances. Other styles such as five-face and hybrids also exist. The one-face style grew out of 2nd century Beikthano, and the four-face out of 7th century Sri Ksetra. The temples, whose main features were the pointed arches and the vaulted chamber, became larger and grander in the Bagan period.
Innovations
Although the Burmese temple designs evolved from Indic, Pyu (and possibly Mon) styles, the techniques of vaulting seem to have developed in Bagan itself. The earliest vaulted temples in Bagan date to the 11th century, while the vaulting did not become widespread in India until the late 12th century. The masonry of the buildings shows "an astonishing degree of perfection", where many of the immense structures survived the 1975 earthquake more or less intact.(Unfortunately, the vaulting techniques of the Bagan era were lost in the later periods. Only much smaller gu style temples were built after Bagan. In the 18th century, for example, King Bodawpaya attempted to build the Mingun Pagoda, in the form of spacious vaulted chambered temple but failed as craftsmen and masons of the later era had lost the knowledge of vaulting and keystone arching to reproduce the spacious interior space of the Bagan hollow temples.
Another architectural innovation originated in Bagan is the Buddhist temple with a pentagonal floor plan. This design grew out of hybrid (between one-face and four-face designs) designs. The idea was to include the veneration of the Maitreya Buddha, the future and fifth Buddha of this era, in addition to the four who had already appeared. The Dhammayazika and the Ngamyethna Pagoda are examples of the pentagonal design.