Abhidharmakośa, the famous fundamental treatise of 5th century by Vasubandhu, explaining the fundaments of system of knowledge according to Vaibhasika tradition of Buddhism is here. The main points of study here are the theory of dharma or elements of existence, perception of reality through indriyas (faculties), the notion of karma in the light of teaching about dharmas, path to liberation – Abhidharma or dharma Nirvana