Conversation so far:
where is calcutta india located on the map
what is the population of kolkata india
According to provisional results of the 2011 national census, Kolkata district had a population of 4,486,679.
when did the name of calcutta change to kolkata
On the 1st of January 2001, the West Bengal Chief Minister Buddhadev Bhattacharya announced that the State Capital 'Calcutta' has been officially renamed 'Kolkata'.

Question: what is the city known for
Self-contained rewrite: what is kolkata known for