There used to be a Dance guru Bharat Muni in Ancient India. He is the creator of "Natyashastra".
It's a collection of principles for Theatre. The basic differentiation of an artist or actor . Like how our Hero should be like ? There are categories to define it. How our heroine should be like ?

What is Rasas or Moods ?

I am writing a collection on it . So that in few months we will be able to make a series on it.