Ashtadhyayi Ashtadhyayi is a Sanskrit treatise on grammar. It was written in the 6th to 5th-century BCE by the Indian grammarian Panini . The Mahābhāsya is attributed to Patanjali which is a commentary on selected rules of Sanskrit grammar from Paṇini's treatise. It is dated to the 2nd century BCE. Natyashastra It is a detailed treatise and handbook on dramatic art. It deals with classical Sanskrit theatre. It is written by the Brahman sage and priest Bharata ( 200 BC to 200 AD ). Its many chapters contain detailed treatments of all the diverse arts that are used in the classical Indian concept of the drama. dance, music, poetics, and general aesthetics. It is also known as the fifth Veda. Brihat Jataka Brihat Jataka is considered the standard textbook on Vedic astrology. It is written by Varahamihira . It is described as “ India’s foremost astrological text” .