The 'Natyashastra', an encyclopedic treatise on the performing arts including theatre, dance, and music, is attributed to:
- Bharata Muni
- Nandikeshvara
- Matanga
- Sharngadeva
Answer: Bharata Muni
Bharata Muni is the legendary author of the 'Natyashastra', which introduces the concept of 'Rasa' theory, fundamental to Indian aesthetics.