A garbhagriha started with a circular architecture like at Gudimellam temple (3rd century BCE). Later it evolved as a square (though there are exceptions), sits on a
plinth, and is also at least approximately a
cube. Compared to the size of the temple that may surround it, and especially the large tower commonly found above it, a garbhagriha is a rather small room. The typical Hindu and Jain garbhagriha is preceded by one or more adjoining pillared
mandapas (porches or halls), which are connected to the sanctum by an open or closed vestibule (
antarala), and through which the priests or devotees may approach the holy shrine in order to worship the presence of the deity in profound, indrawn meditation. In addition to being square, the garbhagriha is most often windowless, has only one entrance that faces the eastern direction of the rising sun (though there are exceptions), and is sparsely lit to allow the devotee's mind to focus on the tangible form of the divine within it. The garbhagriha is also commonly capped by a great tower superstructure. The two main styles of towers are the
shikhara (in India's northern region) or the
vimana (in India's southern region). An early prototype for this style of garbhagriha is the sixth century CE
Deogarh temple in Uttar Pradesh State’s Jhansi district (which also has a small stunted shikhara over it). The style fully emerged in the eighth century CE and developed distinct regional variations in Orissa, central India, Rajasthan, and Gujarat. However, it should be remembered that throughout South Asia stone structures were always vastly outnumbered by buildings made of perishable materials, such as wood, bamboo, thatch and brick. Thus, while some early stone examples have survived, the earliest use of a square garbhagriha cannot be categorically dated simply because its original structural materials have long since decomposed. Some exceptions to the square-rule exist. In some temples, particularly at an early date, the garbhagriha is not quite square, and in some later ones it may be rectangular to ensure enough symmetrical space for the housing of more than one deity, such as at the
Savadi Trimurti Temple. Other rectangular garbhagriha include those at Sasta Temple (Karikkad Ksetram), Manjeri, and at
Varahi Deula. There are a very few examples of larger variance: the chamber at
Gudimallam is both semi-circular at the rear, and set below the main floor level of the temple (see bottom inset image). in the Andhra Pradesh state of India
[note rounded apse instead of more customary square]. The famous 7th-century
Durga temple, Aihole also has a rounded
apse at the garbagriha end, which is echoed in the shape of the chamber. So, too, does the garbhagriha at
Triprangode Siva Temple have a rounded apse. Fully round garbhagriha exist at the Siva Temple, Masaon, as well as at Siva Temple,
Chandrehe. ==Orientation==