It enshrines the principal Buddha i

It enshrines the principal Buddha image and it is the building where monks congregate to participate in religious ceremonies such as the ordination ceremony. It is a sacred area. The sacredness of the area is marked with sema stones or marker stones or boundary stones, which are placed round the ubosoth. The ubosth is also called an ordination hall.
The minor chapel is the temple building in which a Buddha statue is placed and used for religious rites and ceremonies. It is open to laymen who wish to pay respect to the Buddha image or to attend the religious ceremonies. The minor chapel is also called an image hall.