Stupa and Buddha Bihar
Stupa or Chaitya, which represents the Buddhist Universe, is the Buddhist sanctuary, sometimes square and sometimes round, with spires or steps on the capital. Each spire or step represents a heaven, the uppermost portion being a point which is supposed to be the highest peak of Mount Sumeru, a mythical mountain whence the Boddhichitta loses itself in sunya. On the four sides of the chaitya the figures of four Dhyani Buddhas Akshobhya, Ratna sambhav, Amitabha, Amoghasiddhi are placed. The place of Vairochana is in the centre. In some Chaitya Vairochana is placed to the east with Akshobhya.
Source. Short Description of Gods, Goddesses and Ritual Objects of Buddhism and Hinduism in Nepal, Published by Handicraft Association of Nepal
Dec 16, 2009