Agamas are original texts of Jainism based on the discourse of the tirthankara. The discourse delivered in a samavasarana (divine preaching hall) is called Shrut Jnana and comprises eleven angas and fourteen purvas. The discourse is recorded by Ganadharas (chief disciples), and is composed of twelve angas (departments). It is generally represented by a tree with twelve branches. This forms the basis of the Jaina Agamas or canons. These are believed to have originated from Rishabhanatha, the first tirthankara.