Conversation so far:
What was Rabindranath Tagore doing in 1901?
In 1901 Rabindranath Tagore moved to Santiniketan.
What did Rabindranath Tagore do in Santiniketan?
Rabindranath Tagore founded an ashram with a marble-floored prayer hall—The Mandir—an experimental school, groves of trees, gardens, a library.

Question: What did he do after being there?
Self-contained rewrite: What did Rabindranath Tagore do after being in Santiniketan?