Complex sentence: It was described in the treatise "Natya Shastra" by Bharata in the fourth or third century BCE, known for its grace, purity, tenderness, and sculpturesque poses.
Split into simpler sentences: It was described in the treatise "Natya Shastra" by Bharata in the fourth or third century BCE. Bharata Natyam is known for its grace, purity, tenderness, and sculpturesque poses.