What is "sritattvanidhi"

The Sritattvanidhi ("The Illustrious Treasure of Realities") is an treatise written in the 19th century in Karnataka on the iconography and iconometry of divine figures in South India. One of its sections, Sritattvanidhi, includes instructions for and illustrations of 122 postures, making it by far the most elaborate text on asanas in existence before the twentieth century.