Analysis of information sources in references of the Wikipedia article "Bharatanatyam" in English language version.
Quote: "A summation of the signal importance of the Natyasastra for Hindu religion and culture has been provided by Susan Schwartz, "In short, the Natyasastra is an exhaustive encyclopedic dissertation of the arts, with an emphasis on performing arts as its central feature. It is also full of invocations to deities, acknowledging the divine origins of the arts and the central role of performance arts in achieving divine goals (...)".
He also points out that these [Bharatanatyam dance] stances are very similar to Yoga Asanas, and in the Gopuram walls at Chidambaram, at least twenty different classical Yoga Asanas are depicted by the dancers, including Dhanurasana, Chakrasana, Vrikshasana, Natarajasana, Trivikramasana, Ananda Tandavasana, Padmasana, Siddhasana, Kaka Asana, Vrishchikasana and others.
He also points out that these [Bharatanatyam dance] stances are very similar to Yoga Asanas, and in the Gopuram walls at Chidambaram, at least twenty different classical Yoga Asanas are depicted by the dancers, including Dhanurasana, Chakrasana, Vrikshasana, Natarajasana, Trivikramasana, Ananda Tandavasana, Padmasana, Siddhasana, Kaka Asana, Vrishchikasana and others.