Conversation so far:
What happened in the final years for Ion Heliade Rădulescu?
Until his death, he published influential volumes on a variety of issues
What type of issues did Ion Heliade Rădulescu publish influential volumes on?
He concentrated on contributions to history and literary criticism
When did Ion Heliade Rădulescu die?
He died on April 27, 1872

Question: What else did you find interesting?
Self-contained rewrite: What else did you find interesting?