Conversation so far:
who was the painter of the famous painting bharat mata
Bharat Mata is a work painted by the Indian painter Abanindranath Tagore in 1905.
what does the painting bharat mata depict
The work, Bharat Mata, depicts Bharat Mata or Mother India, in the style of a Hindu Goddess.
why is the bharat mata painting significant
The painting, Bhata Mata, holds historical significance as it is one of the earliest visualizations of Bharat Mata, or Mother India.

Question: what was the medium
Self-contained rewrite: what was the medium tagore used for the bharat mata painting