Bharatanatyam is a classical ance form originating from Tamil Nadu, a state in Southern India. This popular South Indian dance form is a 20th century reconstruction of Cathir, the art of temple dancers. Cathir in turn, is derived from ancient dance forms. The word Bharata, some believe, signifies the author of the famous Sanskrit treatise on stagecraft, called NatyaShastra, and the word Bharatanatyam is sometimes given a folk etymology as follows:Bha for Bhava or abhinaya and expression, Ra for raga or melody, and Ta for tala or rhythm.