Bharatanatyam (also spelled Bharathanatyam, Bharatnatyam or Bharata Natyam is a classical dance form originating from Tamil Nadu of Southern India. It owes its current name to Krishna Iyer and later, Rukmini Devi Arundale. Bharata refers to the author of the Natya Shastra, and natya is Sanskrit for the art of dance-drama. It was brought to the stage at the beginning of the 20th century by Krishna Iyer. Bharatanatyam is thought to have been created by Bharata Muni, a Hindu sage, who wrote the Natya Shastra, the most important ancient treatise on classical Indian dance. It is also called the fifth Veda in reference to the foundation of Hindu religion and philosophy, from which sprang the related South Indian musical tradition of Carnatic music. However, there are references to Rishi Agastya teaching his disciples a different form of sacred dance than the one taught by Bharata Muni.