[Thai pronunciation of uposatha (P.); upavasatha (Skt.)] : A Buddhist building with a rectangular plan, inside which is enshrined the presiding
Buddha image. Outside and around the ubosot are placed eight boundary stones or marker slabs (Thai : bai sema) at the eight cardinal points in
order to mark off the sacred boundary of the Sangha or the monastic Order. This edifice is the place where a Buddhist ordination and ritual are

[Ref: An outline of the History of Religious Architecture in Thailand - Sonthiwan Intralib (1991).]
Protuberance (cranial knob) on the head of a Buddha image symbolizing his wisdom and openness as an enlightened being.
The royal ox; the humped Brahmin bull, otherwise called king of the white oxen.

[Ref: The Wheel of the Law - Alabaster Henry (1871) - Trubner & Co, London - page 295.]