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'.
what is kolkata known for
Kolkata is the educational, commercial and cultural centre of the Eastern part of India. Kolkata is a pioneer in the field of drama, arts, theatre and literature.

Question: how old is the city
Self-contained rewrite: how old is kolkata