(literally, knowledge of dwelling) and Sastra meaning system or knowledge in Sanskrit. There exist many Vastu-Sastras on the art of building temples, such as one by Thakkura Pheru, describing where and how temples should be built. By the 6th century CE, Sanskrit manuals for in India. Vastu-Sastra manuals included chapters on home construction, town planning, and how efficient villages, towns and kingdoms integrated temples, water bodies and gardens within them to achieve harmony with nature. While it is unclear, states Barnett, as to whether these temple and town planning texts were theoretical studies and if or when they were properly implemented in practice, the manuals suggest that town planning and Hindu temples were conceived as ideals of art and integral part of Hindu social and spiritual life. The Silpa Prakasa of Odisha, authored by Ramacandra Bhattaraka Kaulacara in the 9th or 10th centuries CE, is another Sanskrit treatise on Temple Architecture. Silpa Prakasa describes the geometric principles in every aspect of the temple and symbolism such as 16 emotions of human beings carved as 16 types of female figures. These styles were perfected in Hindu temples prevalent in eastern states of India. Other ancient texts found expand these architectural principles, suggesting that different parts of India developed, invented and added their own interpretations. For example, in Saurastra tradition of temple building found in western states of India, the feminine form, expressions and emotions are depicted in 32 types of Nataka-stri compared to 16 types described in Silpa Prakasa. Silpa Prakasa provides brief introduction to 12 types of Hindu temples. Other texts, such as Pancaratra Prasada Prasadhana compiled by Daniel Smith and Silpa Ratnakara compiled by Narmada Sankara provide a more extensive list of Hindu temple types. Ancient Sanskrit manuals for temple construction discovered in Rajasthan, in northwestern region of India, include Sutradhara Mandana's Prasadamandana (literally, manual for planning and building a temple). Manasara, a text of South Indian origin, estimated to be in circulation by the 7th century CE, is a guidebook on South Indian temple design and construction. Isanasivagurudeva paddhati is another Sanskrit text from the 9th century describing the art of temple building in India in south and central India. In north India, Brihat-samhita by Varāhamihira is the widely cited ancient Sanskrit manual from 6th century describing the design and construction of Nagara style of Hindu temples. The plan A Hindu temple design follows a geometrical design called