The abhidharma Pitaka contains philosophical, psychological, and doctrinal discussions and classifications. It consists of seven separate works. They include detailed classifications of psychological phenomena, metaphysical analysis, and a thesaurus of technical vocabulary.

The building also houses a Shiva’s mount Nandi. This figure was found buried in Koh Thom district in Kandal province in 1983. It is estimated to be 80 percent silver and 20 percent bronze, copper, lead, iron and zinc.