Dear Palaniappan,
The recognition of true historical background of the Prabodhacandrodaya and the references to this contained within the play itself offer a case in point. I have discussed this in my introduction to my translation of the work, which is available here:
https://www.academia.edu/27671250/Introduction_to_The_Rise_of_Wisdom_Moon_Prabodhacandrodaya_
No doubt others will be able to bring up other examples.
best,
Matthew