Butön (Bu ston rin chen grub, 1290–1364), was a Sakya (Sa skya) scholar. His Treasury of Precious Teaching is a history of Buddhism in India and Tibet, completed in around 1326. It is structured in four sections, beginning with an explanation of Buddhism, followed by a history of its development in India, a short history of Buddhism in Tibet, and lastly a section cataloguing the translations of Buddhist texts to which Butön had access. The third section has some material on events and attitudes regarding Tibetan law, particularly in the imperial period.
